crop-chem-docs/corpus/epa_ppls/100-816.md

# Dual Magnum® Herbicide

- EPA Reg No: **100-816**
- Registrant: SYNGENTA CROP PROTECTION, LLC
- Signal word: Caution
- Active ingredients: S-Metolachlor (83.7%)
- Label accepted: 2024-05-22
- Source PDF: https://www3.epa.gov/pesticides/chem_search/ppls/000100-00816-20240522.pdf

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Fast Track Label Acceptable (Highlighted/Indicated Changes) v.20240124
May 22, 2024
Rachel Hardie
Regulatory Product Manager
Syngenta Crop Protection, LLC
P. O. Box 18300
Greensboro, NC 27419
Subject: Approval of Label Amendment; Only Indicated Changes Reviewed – Updating
Peanut Crop Directions For Use, Updating Tank Mix-Partners, etc.
 Product Name: Dual Magnum He rbicide
EPA Registration Number: 100-816
Application Date: 4/29/24
Case Number: 609533
Dear Rachel Hardie,
The amended label referred to above, submitted in connection with registration under the
Federal Insecticide, Fungicide, and Rodenticide Act (FIFRA), as amended, is acceptable.
However, EPA reviewed only the label changes highlighted, marked, or otherwise indicated on
the submitted label. Any other changes to the previously approved label that were not clearly
highlighted, marked, or otherwise indicated in your submission were not reviewed and may
form the basis of regulatory and/or enforcement action if later discovered by the Agency.
Further, submission of a label amendment application with unidentified changes may be
considered a knowing submission of false information to the Agency. This approval does not
affect any conditions that were previously imposed on this registration. You continue to be
subject to existing conditions on your registration and any deadlines connected with them.
The label submitted with the application has been stamped “Accepted Only Indicated Revisions
Reviewed” and is enclosed for your records.
This labeling supersedes all previously accepted labeling. You must submit one copy of the final
printed labeling before you release the product for shipment with the new labeling. In
accordance with 40 C.F.R. § 152.130(c), you may distribute or sell this product under the
previously approved labeling for 18 months from the date of this letter. After 18 months, you
may only distribute or sell this product if it bears this new revised labeling or subsequently
approved labeling. “To distribute or sell” is defined under FIFRA section 2(gg) and its
implementing regulation at 40 C.F.R. § 152.3.

Page 2 of 2
EPA Reg. No. 100-816
Case Number 609533
Should you wish to add/retain a reference to the company’s website on your label, then please
be aware that the website becomes labeling under FIFRA and is subject to review by the
Agency. If the website contains any false or misleading statement, design, or graphic, the
product may be misbranded and unlawful to sell or distribute under FIFRA Sections 2(q)(1)(A)
and 12(a)(1)(E). 40 C.F.R. § 156.10(a)(5) lists examples of statements EPA may consider false or
misleading. In addition, regardless of whether a website is referenced on the product label,
claims made as part of the product’s sale or distribution may not substantially differ from those
claims approved through the registration process under FIFRA Section 12(a)(1)(B). Therefore,
should the Agency find or if it is brought to our attention that a website contains false or
misleading statements or claims substantially differing from the EPA approved registration, the
product will be referred to the EPA’s Office of Enforcement and Compliance Assurance.
Your release for shipment of the product constitutes acceptance of these conditions. If these
conditions are not complied with, the registration will be subject to cancellation in accordance
with FIFRA section 6.
If you have any questions, please contact Elizabeth Danon at 202-566-0623 or at
danon.elizabeth@epa.gov.
Sincerely,
Kable Bo Davis
Senior Regulatory Specialist
Office of Pesticide Programs
Registration Division, Immediate Office
Enclosure

Dual Magnum Herbicide
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Sale, use and distribution of this product in Nassau and Suffolk Counties in the State
of New York is prohibited.
S-METOLACHLOR GROUP 15 HERBICIDE

Dual Magnum® Herbicide

For weed control in corn; cotton; grasses grown for seed; horseradish; legume vegetables;
peanuts; potatoes; pumpkin; rhubarb; safflowers; sorghum (forage, grain and sweet);
soybean; sugar beets; sugarcane; sunflowers; and tomatoes

Active Ingredient:
S-metolachlor*: ....................................................................................................... 83.7%
Other Ingredients: 16.3%
Total: 100.0%

*CAS No. 87392-12-9

Dual Magnum
® Herbicide is formulated as an Emulsifiable Concentrate (EC) and
contains the equivalent of 83.7% or 7.62 lb of active ingredient per gallon.

KEEP OUT OF REACH OF CHILDREN

CAUTION

See additional precautionary statements and directions for use inside booklet.

EPA Reg. No. 100-816
EPA Est.


___ gallons
Net Contents
[Batch Code: _____] (For nonrefillables only.)

100-816
05/22/2024

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TABLE OF CONTENTS

1.0 FIRST AID
PRECAUTIONARY STATEMENTS
2.0 PRECAUTIONARY STATEMENTS
2.1 Hazards to Humans and Domestic Animals
2.2 Personal Protective Equipment (PPE)
2.3 User Safety Requirements
2.4 Engineering Controls
2.5 User Safety Recommendations
2.6 Environmental Hazards
2.6.1 Groundwater Advisory
2.6.2 Surface Water Advisory
2.6.3 Non-target Organism Advisory
2.6.4 Reporting Ecological Incidents
2.6.5 Mixing/Loading/Application Instructions
DIRECTIONS FOR USE
3.0 PRODUCT INFORMATION
3.1 Weed Resistance Management
3.1.1 Principles of Herbicide Resistant Weed Management
4.0 APPLICATION DIRECTIONS
4.1 Methods of Application
4.1.1 Band Application
4.2 Application Equipment
4.3 Application Volume and Spray Coverage
4.4 Mixing Directions
4.4.1 Dual Magnum Herbicide Alone
4.4.2 Tank-Mix Precautions
4.4.3 Tank-Mix Compatibility
4.4.4 Dual Magnum Herbicide In Tank Mixtures
4.5 Dry Bulk Granular Fertilizers
4.5.1 Preparation of Herbicide/Fertilizer Mixtures
4.5.2 Pneumatic (Compressed Air) Application
4.5.3 Precautions
4.5.4 Application Instructions
4.6 Application through Irrigation Systems (Chemigation)
4.6.1 Chemigation Restrictions
4.6.2 Operating Instructions For Chemigation
4.6.3 Specific Instructions For Public Water Systems
4.6.4 Application Directions For Irrigation Systems
4.6.5 Center Pivot Irrigation Application
4.7 Sprayer Cleanout

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5.0 REPLANT AND ROTATIONAL CROPS
5.1 Replant and Rotational Crops
5.2 Additional Rotational Crop Options
5.3 Limited Water or Irrigation Conditions
6.0 COVER CROPS
6.1 Field Bioassay for Cover Crops
7.0 RESTRICTIONS AND PRECAUTIONS
7.1 Use Restrictions
7.2 Use Precautions
7.3 Mandatory Spray Drift Management
7.4 SPRAY DRIFT ADVISORIES
7.4.1 Importance of Droplet Size
7.4.2 Controlling Droplet Size – Ground Boom
7.4.3 Controlling Droplet Size – Aircraft
7.4.4 Release Height - Aircraft
7.4.5 Boom Height - Ground boom
7.4.6 Boomless Ground Applications
7.4.7 Shielded Sprayers
7.4.8 Temperature and Humidity
7.4.9 Temperature Inversions
7.4.10 Wind
7.4.11 Windblown Soil Particles
7.4.12 Sensitive Areas
8.0 WEEDS CONTROLLED OR PARTIALLY CONTROLLED BY DUAL MAGNUM HERBICIDE
APPLIED PRIOR TO WEED EMERGENCE
9.0 CROP USE DIRECTIONS
9.1 Corn
9.1.1 Fall, Preplant Surface, Preplant Incorporated, Preemergence or Postemergence
Applications
9.1.2 Tank-Mix Combinations for Corn
9.2 Cotton
9.2.1 Fall, Preplant Incorporated, Preemergence or Postemergence Applications
9.2.2 Tank-Mix Combinations for Cotton
9.3 Grasses Grown for Seed
9.4 Horseradish
9.5 Legume Vegetables (Succulent or Dried), Crop Group 6, except Soybean [(NOT FOR
POSTEMERGENCE AND OR CHEMIGATION (CENTER PIVOT ONLY) USE IN
CALIFORNIA)]
9.5.1 Fall, Preplant Incorporated, Preemergence, Postemergence and or Chemigation (Center
Pivot Only) Applications
9.5.2 Tank-Mix Combinations for Legume Vegetables
9.6 Peanut
9.6.1 Preplant or Preplant Incorporated, Preemergence and Postemergence
9.6.2 Tank-Mix Combinations for Peanut
9.7 Potato
9.7.1 Incorporated, Preemergence, and Postemergence and Lay-By Application

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9.7.2 Tank-Mix Combinations for Potato
9.8 Pumpkin
9.9 Rhubarb
9.10 Safflowers
9.11 Sorghum (Concep III Treated Only)
9.11.1 Grain or Forage Sorghum, Fall, Preplant Surface, Preplant Incorporated,
Preemergence or Postemergence Applications
9.11.2 Tank-Mix Combinations for Sorghum (Concep III Treated Only)
9.12 Sorghum, Sweet (Concep III Treated Only)
9.13 Soybeans [(NOT FOR POSTEMERGENCE USE IN CALIFORNIA)]
9.13.1 Fall, Preplant Surface, Preplant Incorporated, Preemergence or Postemergence
Applications
9.13.2 Tank-Mix Combinations for Soybeans
9.14 Sugar Beets
9.14.1 Postemergence Application
9.14.2 Tank-Mix Combinations for Sugar Beets
9.15 Sugarcane [(NOT FOR USE IN CALIFORNIA)]
9.15.1 Preplant, Preemergence and Postemergence Applications
9.15.2 Tank-Mix Combinations for Sugarcane
9.16 Sunflowers
9.17 Tomato
10.0 STORAGE AND DISPOSAL
11.0 CONDITIONS OF SALE AND LIMITATION OF WARRANTY AND LIABILITY
12.0 APPENDIX
12.1 Tank-Mix Partner Table

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1.0 FIRST AID
FIRST AID
If in eyes x Hold eye open and rinse slowly and gently with water for 15-20
minutes.
x Remove contact lenses, if present, after the first 5 minutes, then
continue rinsing eye.
x Call a poison control center or doctor for treatment advice.
If on skin or
clothing
x Take off contaminated clothing.
x Rinse skin immediately with plenty of water for 15-20 minutes.
x Call a poison control center or doctor for treatment advice.
If swallowed x Call a poison control center or doctor immediately for treatment
advice.
x Have person sip a glass of water if able to swallow.
x Do not induce vomiting unless told to by a poison control center or
doctor.
x Do not give anything by mouth to an unconscious person.
If inhaled x Move person to fresh air.
x If person is not breathing, call 911 or an ambulance, then give
artificial respiration, preferably mouth-to-mouth, if possible.
x Call a poison control center or doctor for further treatment advice.
Have the product container or label with you when calling a poison control center or
doctor, or going for treatment.
SYNGENTA HOTLINE NUMBER
For 24-Hour Medical Emergency Assistance (Human or Animal)
Or Chemical Emergency Assistance (Spill, Leak, Fire or Accident)
Call
1-800-888-8372

PRECAUTIONARY STATEMENTS

2.0 PRECAUTIONARY STATEMENTS
2.1 Hazards to Humans and Domestic Animals
CAUTION
Causes moderate eye irritation. Harmful if swallowed or absorbed through skin. Avoid
contact with eyes, skin, or clothing. Wash thoroughly with soap and water after handling and
before eating, drinking, chewing gum, using tobacco or using the toilet. Remove and wash
contaminated clothing before reuse. Prolonged or frequently repeated skin contact may
cause allergic reactions in some individuals.

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2.2 Personal Protective Equipment (PPE)
All applicators and other handlers must wear:
x Long-sleeved shirt and long pants
x Chemical-resistant gloves made of barrier laminate or Viton TM t 14 mils
x Shoes plus socks

2.3 User Safety Requirements
Follow manufacturer's instructions for cleaning/maintaining PPE. If no such instructions for
washables exist, use detergent and hot water. Keep and wash PPE separately from other
laundry.

2.4 Engineering Controls
Mixers and loaders supporting aerial applications are required to use closed systems. The
closed system must be used in a manner that meets the requirements listed in the Worker
Protection Standard (WPS) for agricultural pesticides. When using the closed system, the
mixers’ and loaders’ PPE requirements may be reduced or modified as specified in the WPS.
When handlers use closed systems, enclosed cabs, or aircraft in a manner that meets the
requirements listed in the Worker Protection Standard (WPS) for agricultural pesticides (40
CFR 170.607(d-f)), the handler PPE requirements may be reduced or modified as specified in
the WPS.
2.5 User Safety Recommendations
User Safety Recommendations
Users should:
x Remove clothing/PPE immediately if pesticide gets inside. Then wash thoroughly
and put on clean clothing.
x Remove PPE immediately after handling this product. Wash the outside of gloves
before removing. As soon as possible, wash thoroughly and change into clean
clothing.

2.6 Environmental Hazards
Do not apply directly to water, to areas where surface water is present, or to intertidal areas
below the mean high water mark. Do not contaminate water when disposing of equipment
washwater or rinsate.

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2.6.1 Groundwater Advisory
S-metolachlor is known to leach through soil into groundwater under certain conditions as a
result of label use. This chemical may leach groundwater if used in areas where soils are
permeable, particularly where the water table is shallow.
2.6.2 Surface Water Advisory
This product may impact surface water quality due to runoff of rain water or through ground
spray drift. This is especially true for poorly draining soils and soils with shallow ground
water. This product is classified as having high potential for reaching surface water via runoff
for several weeks or months after application. A level, well-maintained vegetative buffer strip
between areas to which this product is applied and surface water features such as ponds,
streams, and springs will reduce the potential loading of S-metolachlor from runoff water and
sediment. Runoff of this product will be reduced by avoiding applications when rainfall or
irrigation is expected to occur within 48 hours.
2.6.3 Non-target Organism Advisory
This product is toxic to plants and may adversely impact the forage and habitat of non-target
organisms, including pollinators, in areas adjacent to the treated site. Protect the forage and
habitat of non-target organisms by following label directions intended to minimize spray drift.
2.6.4 Reporting Ecological Incidents
To report ecological incidents, including mortality, injury, or harm to plants and animals, call
1-800-888-8372.
2.6.5 Mixing/Loading/Application Instructions
Care must be taken when using this product to prevent back-siphoning into wells, spills, or
improper disposal of excess pesticide, spray mixtures, or rinsates. Check-valves or anti-
siphoning devices must be used on all mixing and/or irrigation equipment.
x This product must not be mixed or loaded within 50 ft of perennial or intermittent streams
and rivers, natural or impounded lakes and reservoirs.
x This product must not be mixed/loaded or used within 50 ft of all wells, including
abandoned wells, drainage wells, and sink holes.
x Operations that involve mixing, loading, rinsing, or washing of this product into or from
pesticide handling or application equipment or containers within 50 ft of any well are
prohibited, unless conducted on an impervious pad constructed to withstand the weight of
the heaviest load that may be positioned on or moved across the pad.
o Such a pad shall be designed and maintained to contain any product spills or
equipment leaks, container or equipment rinse or wash water, and rain water that
may fall on the pad.
o Surface water shall not be allowed to either flow over or from the pad, which means
the pad must be self-contained.
o The pad shall be sloped to facilitate material removal.
o An unroofed pad shall be of sufficient capacity to contain at a minimum 110% of
the capacity of the largest pesticide container or application equipment on the pad.

Dual Magnum Herbicide
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o A pad that is covered by a roof of sufficient size to completely exclude precipitation
from contact with the pad shall have a minimum containment capacity of 100% of
the capacity of the largest pesticide container or application equipment on the pad.
x Containment capacities as described above shall be maintained at all times.
The above-specified minimum containment capacities do not apply to vehicles when
delivering pesticide shipments to the mixing/loading site.

DIRECTIONS FOR USE

It is a violation of Federal Law to use this product in a manner inconsistent with its labeling.
Dual Magnum Herbicide must be used only in accordance with directions on this label or in
separately published EPA accepted supplemental labeling for this product.

Do not apply this product in a way that will contact workers or other persons, either directly or
through drift. Only protected handlers may be in the area during application. For any
requirements specific to your State or Tribe, consult the agency responsible for pesticide
regulation.
Endangered Species Protection Requirements
It is a Federal offense to use any pesticide in a manner that results in an unauthorized “take”
(e.g., kill or otherwise harm) of an endangered species and certain threatened species, under
the Endangered Species Act section 9. When using this product, you must follow the
measures contained in the Endangered Species Protection Bulletin for the area in which you
are applying the product. You must obtain a Bulletin no earlier than six months before using
this product. To obtain Bulletins, consult http://www.epa.gov/espp/, call 1-844-447-3813, or
email ESPP@epa.gov. You must use the Bulletin valid for the month in which you will apply
the product.

AGRICULTURAL USE REQUIREMENTS

Use this product only in accordance with its labeling and with the Worker Protection
Standard, 40 CFR Part 170. This Standard contains requirements for the protection of
agricultural workers on farms, forests, nurseries, and greenhouses, and handlers of
agricultural pesticides. It contains requirements for training, decontamination,
notification, and emergency assistance. It also contains specific instructions and
exceptions pertaining to the statements on this label about personal protective
equipment (PPE) and restricted-entry interval. The requirements in this box only apply
to uses of this product that are covered by the Worker Protection Standard (WPS).
Do not enter or allow worker entry into treated areas during the restricted-entry
interval (REI) of 24 hours.

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Exception: If the product is soil-injected or soil incorporated, the Worker Protection
Standard, under certain circumstances, allows workers to enter the treated area if
there will be no contact with anything that has been treated.
PPE required for early entry to treated areas that is permitted under the Worker
Protection Standard and that involves contact with anything that has been treated,
such as plants, soil, or water, is:
x Coveralls
x Chemical-resistant gloves made of barrier laminate or Viton t 14 mils
x Shoes plus socks

3.0 PRODUCT INFORMATION
Dual Magnum Herbicide is a selective herbicide that can be applied for control of most
annual grasses and certain broadleaf weeds in corn (all types); cotton; grasses grown for
seed; horseradish; legume vegetables; peanuts; potatoes; pumpkin; rhubarb; safflowers;
sorghum (forage, grain and sweet); soybean; sugar beets; sugarcane; sunflowers; and
tomatoes.
Dual Magnum
 Herbicide is taken up by the shoots and/or roots of emerging weeds. This
uptake results in the inhibition of shoot and root tissue growth soon after weed germination.
Because of this, Dual Magnum
 Herbicide will not control emerged weeds. Control weeds that
are present by another means, e.g., mechanical means or by another herbicide.
3.1 Weed Resistance Management
S-METOLACHLOR GROUP 15 HERBICIDE

S-metolachlor, the active ingredient in this product, is a Group 15 herbicide based on the
mode of action classification system of the Weed Science Society of America. Any weed
population may contain plants naturally resistant to Group 15 herbicides. Such resistant
weed plants may not be effectively managed using Group 15 herbicides but may be
effectively managed utilizing another herbicide alone or in mixtures from a different group
and/or by using cultural or mechanical practices. However, an herbicide mode of action
classification by itself may not adequately address specific weeds that are resistant to
specific herbicides. Consult your local company representative, state cooperative extension
service, professional consultants or other qualified authorities to determine appropriate
actions for treating specific resistant weeds.
3.1.1 Principles of Herbicide Resistant Weed Management
Scout and know your field
• Know weed species present in the field to be treated through scouting and field
history. An understanding of weed biology is useful in designing a resistance
management strategy. Ensure the weed management program will control all weeds
present.

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• Fields should be scouted prior to application to determine species present and growth
stage. Always apply this herbicide at the full labeled rate and correct timing for the
weeds present in the field.
Utilize non-herbicidal practices to add diversity
• Use diversified management tactics such as cover crops, mechanical weed control,
harvest weed seed control, and crop rotation as appropriate.
Use good agronomic practices, start clean and stay clean
• Use good agronomic practices that enhance crop competitiveness.
• Plant into weed-free fields utilizing tillage or an effective burndown herbicide for control
of emerged weeds.
• Sanitize farm equipment to avoid spreading seed or vegetative propagules prior to
leaving fields.
Difficult to control weeds
• Fields with difficult to control weeds should be planted in rotation with crops that allow
the use of herbicides with an alternative mode of action or different management
practices.
• Difficult to control weeds may require sequential applications, such as a broad
spectrum preemergence herbicide followed by one or more postemergence herbicide
applications. Utilize herbicides containing different modes of action effective on the
target weeds in sequential applications.
Do not overuse the technology
• Do not use this or any other herbicide with the same mode of action in a single
growing season unless mixed with an herbicide with a different mode of action which
provides overlapping spectrum for difficult to control weeds.
Scout and inspect fields following application
• Prevent an influx of weeds into the field by controlling weeds in field borders.
• Scout fields after application to verify that the treatment was effective.
• Suspected- herbicide resistant weeds may be identified by these indicators
• Failure to control a weed species normally controlled by the herbicide at the
dose applied, especially if control is achieved on adjacent weeds;
• A spreading patch of non-controlled plants of a particular weed species; and
• Surviving plants mixed with controlled individuals of the same species.
• Report non-performance of this product to your Syngenta retailer, Syngenta
representative, or call 1-866-Syngent(a) (866-796-4368). If resistance is suspected
ensure weed escapes are controlled using an herbicide with an effective mode of
action and/or use non-chemical means to prevent further seed production.

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Prevent weed escapes before, during, and after harvest
• Do not allow weed escapes to produce seed or vegetative structures such as tubers or
stolons which contribute to spread and survival. Consider harvest weed seed
management and control weeds postharvest to prevent seed production.
Resistant Weeds
x Contact your local Syngenta representative, retailer, crop advisor or extension agent to
determine if weeds resistant to this mode of action are present in your area. If
resistant biotypes have been reported, use the full labeled rate of this product, apply at
the labeled timing, and tank-mix with a different mode of action product so there are
multiple effective modes of application for each suspected resistant weed.

4.0 APPLICATION DIRECTIONS
4.1 Methods of Application
Applications with Dual Magnum Herbicide alone or in tank mixtures are permitted by ground,
by air and via chemigation. Preplant surface, preplant incorporated, preemergence and
postemergence or lay-by applications are allowed as specified in Section 9.0. For band-
application refer to Section 4.1.1. Refer to Section 4.6 for details of application by
chemigation.

It is the pesticide user’s responsibility to ensure that all products are registered for the
intended use. Read and follow the applicable restrictions and limitations and directions for
use on all product labels involved in tank mixing. Users must follow the most restrictive
directions for use and precautionary statements of each product in the tank mixture.

4.1.1 Band Application
Calculate the amount of herbicide and water volume needed for band treatment by the
following formula:

݀݊ܽܤ ݄ݐ݀݅ݓ ݊݅ ݏ݄݁ܿ݊݅
ݓ݋ܴ ݄ݐ݀݅ݓ ݊݅ ݏ݄݁ܿ݊݅ ݔ ݐݏܽܿ݀ܽ݋ݎܤ ݁ݐܽݎ
݁ݎܿܣ= ݐ݊ݑ݋݉ܣ ݀݁݀݁݁݊ ݎ݁݌ ݁ݎܿܣ ݂݋ ݈݀݁݅ܨ

4.2 Application Equipment
x Spray equipment configuration should be arranged to provide accurate and uniform
coverage of the target area and minimize potential for spray drift.
x To ensure accuracy, calibrate sprayer before each use.
x For information on spray equipment and calibration, consult spray equipment
manufacturers and/or state recommendations.

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x All ground, aerial, and chemigation application equipment must be properly maintained
and calibrated using appropriate carriers.
x For aerial applications, use low-drift nozzles.
x For ground applications, use sprayers that provide accurate and uniform application.
x For preplant incorporated application, use an implement capable of providing uniform
incorporation.

4.3 Application Volume and Spray Coverage
x For ground application, apply alone or in tank mixtures in a minimum of 10 gal/A of spray
mixture unless otherwise specified.
x For aerial application, apply alone or in tank mixtures in a minimum total volume of 2 gal/A
of spray mixture.

4.4 Mixing Directions
1. Thoroughly clean spray equipment before using this product. Dispose of the cleaning
solution in a responsible manner.
2. Prepare no more spray mixture than is needed for the immediate operation.
3. Keep product container tightly closed when not in use.
4. Do not let the spray mixture stand overnight in the spray tank.
5. Flush the spray equipment thoroughly following each use and apply the rinsate to a
previously treated area.

4.4.1 Dual Magnum Herbicide Alone
1. Fill the spray tank ½-¾ full with water or fluid fertilizer.
2. Add the proper amount of Dual Magnum
 Herbicide.
3. Add the rest of the water or fluid fertilizer.
4. Provide sufficient agitation during mixing and application to maintain a uniform emulsion.

4.4.2 Tank-Mix Precautions
x It is the pesticide user’s responsibility to ensure that all products are registered for the
intended use. Read and follow the applicable restrictions, limitations and directions for use
on all product labels involved in tank mixing. User must follow the most restrictive
directions for use and precautionary statements of each product in the tank mixture.
x For tank mixtures with wettable powder or dry flowable formulations, use screens and
strainers no finer than 50-mesh.
x Check compatibility ( Section 4.4.3) with other pesticides and/or liquid fertilizers before
mixing in spray tank.
NOTE: Nitrogen solutions or complete fluid fertilizers may replace all or part of the water in
the spray for applications prior to crop emergence. Because liquid fertilizers vary, even within
the same analysis, always check compatibility with pesticide(s) before use.
Incompatibility of tank mixtures is more common with suspensions of fertilizer and pesticides.

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4.4.3 Tank-Mix Compatibility
x Conduct a jar test using a 1 pt to 1 qt container with lid by adding water or other intended
carrier such as a liquid fertilizer to the jar.
x Next, add the appropriate amount of pesticides(s) or tank-mix partner(s) in their relative
proportions based on recommended label rates. Add tank-mix components separately in
the order described in the tank-mixing section, Section 4.4.4. After each addition, shake
or stir gently to thoroughly mix.
x After all ingredients have been added, put the lid on the jar, tighten and invert the jar 10
times to mix.
x After mixing, let the mixture stand 15 –30 minutes and then examine for signs of
incompatibility such as obvious separation, large flakes, precipitates, gels or heavy oily
film on the jar.
x If the mixture remains mixed or can be remixed readily, it is physically compatible and can
be used.
x If the mixture is incompatible, repeat the test using a compatibility agent at the
recommended rate. Or, if applicable, slurry dry formulations in water before adding to the
jar. If incompatibility is still observed after following these procedures, do not use the
mixture.
x After compatibility testing is complete, dispose of any pesticide wastes in accordance with
the storage and disposal section, Section 10.0, of this label.

4.4.4 Dual Magnum Herbicide In Tank Mixtures
1. Fill the spray tank ¼ full with water and start the agitation.
2. Check the tank mix partner label for any specific instructions pertaining to the tank- mix
partner.
3. Add the tank mix partner and allow it to become dispersed.
4. Add Dual Magnum
 Herbicide.
5. Add glyphosate or paraquat product if one is being used.
6. Add the remainder of the water and maintain agitation during mixing and application to
maintain a uniform suspension.
7. Fluid fertilizers may replace all or part of the water as carrier for applications prior to crop
emergence unless otherwise specified.

4.5 Dry Bulk Granular Fertilizers
Many dry bulk granular fertilizers may be impregnated or coated with Dual Magnum Herbicide
alone or selected Dual Magnum Herbicide tank mixtures which are registered for preplant
incorporated or preplant surface applications which are used to control weeds in crops on the
Dual Magnum Herbicide label and are not prohibited from use on dry bulk granular fertilizers.
When applying Dual Magnum Herbicide or Dual Magnum Herbicide mixtures with dry bulk
granular fertilizers, follow all directions for use, restrictions and precautions on the respective
product labels, regarding target crops, rates per acre, soil texture, application methods
(including timing of application), and rotational crops.

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All individual state regulations relating to dry bulk granular fertilizer blending, registration,
labeling, and application are the responsibility of the individual and/or company selling the
herbicide/fertilizer mixture.

4.5.1 Preparation of Herbicide/Fertilizer Mixtures
x Use any closed drum, belt, ribbon, or other commonly used dry bulk fertilizer blender.
x Place the nozzles used to spray Dual Magnum Herbicide and Dual Magnum Herbicide
mixtures onto the fertilizer in such a way as to provide uniform spray coverage.
x Use care to aim the spray directly onto the fertilizer only and to avoid spraying the walls of
the blender.
x If the herbicide/fertilizer mixture is too wet, add a highly absorptive material or similar
granular clay or diatomaceous earth materials, to obtain a dry, free-flowing mixture.
x Add absorptive materials only after the herbicide has been thoroughly blended into the
fertilizer mixture.
x Best application results will be obtained by using a granule of 6/30 particle size or of a
size similar to that of the fertilizer material being used.
x Generally, less than 2% by weight of absorptive material will be needed.
x Avoid using more than 5% absorptive material by weight.
x Calculate amounts of Dual Magnum Herbicide by the following formula:

2000
ܾ݈ ݂݋ ݎ݁ݖ݈݅݅ݐݎ݂݁ ݎ݁݌ ݁ݎܿܣݔ ݐ݌ ݂݋ ݀݅ݑݍ݈݅ ݎ݋ ݈ܾ݁ܽݓ݋݈݂ ݐܿݑ݀݋ݎ݌
݁ݎܿܣ= ݐ݌ ݂݋ ݀݅ݑݍ݈݅ ݎ݋ ݈ܾ݁ܽݓ݋݈݂ ݐܿݑ݀݋ݎ݌
݊݋ݐ ݂݋ ݎ݁ݖ݈݅݅ݐݎ݂݁

4.5.2 Pneumatic (Compressed Air) Application
x High humidity, high urea concentrations, low fertilizer use rates, and dusty fertilizer may
cause fertilizer mixture to build up or plug the distributor head, air tubes, or nozzle
deflector plates.
x To minimize buildup, premix Dual Magnum
 Herbicide with Exxon Aromatic 200 at a rate of
1.0-4.0 pt/gal of Dual Magnum Herbicide.
x Aromatic 200 is a noncombustible/nonflammable petroleum product.
x Aromatic 200 may be used in either a fertilizer blender or through direct injection systems.
x Avoid drying agents when using Aromatic 200.

4.5.3 Precautions
x Use mixtures of Dual Magnum Herbicide and Aromatic 200 on dry fertilizer only. Poor
results or crop injury may result if these mixtures are used in water or liquid fertilizer
solutions for spraying applications.
o When impregnating Dual Magnum
 Herbicide in a blender before application, a drier
mixture can be attained by substituting a drying agent for Aromatic 200.
o Agsorb® FG or drying agents of 6/30 particle size will provide best results.
x When possible, avoid drying agents when using on-board impregnation equipment.
x TO AVOID POTENTIAL FOR EXPLOSION:

Dual Magnum Herbicide
15

1. Do not impregnate Dual Magnum Herbicide or Dual Magnum Herbicide mixtures on
ammonium nitrate, potassium nitrate, or sodium nitrate, either alone or in blends with
other fertilizers.
2. Do not use Dual Magnum Herbicide or Dual Magnum Herbicide mixtures on straight
limestone, since absorption will not be achieved. Fertilizer blends containing
limestone can be impregnated.

4.5.4 Application Instructions
x Apply 200-700 lb of the herbicide/fertilizer mixture per acre.
x For best results, apply the mixture uniformly to the soil with properly calibrated equipment
immediately after blending.
x Uniform application of the herbicide/fertilizer mixture is essential to prevent possible crop
injury.
x Non-uniform application may also result in unsatisfactory weed control. In areas where
conventional tillage is practiced, a shallow incorporation of the mixture into the soil may
improve weed control.
x On fine- or medium textured soils in areas where soil incorporation is not planned, i.e.,
reduced tillage situations or in some conventional till situations, make applications
approximately 30 days before planting to allow moisture to move the herbicide/fertilizer
mixture into the soil.
x On coarse textured soils, make applications approximately 14 days prior to planting.
x Precaution: To avoid crop injury, do not use the herbicide/fertilizer mixture on crops
where bedding occurs.

4.6 Application through Irrigation Systems (Chemigation)
4.6.1 Chemigation Restrictions
x ONLY APPLY THIS PRODUCT THROUGH CENTER-PIVOT IRRIGATION SYSTEMS.
x If you have questions about calibration, you should contact State Extension specialists,
equipment manufacturers, or other experts.
x Do not connect an irrigation system (including greenhouse systems) used for pesticide
application to a public water system, unless the pesticide label-prescribed safety devices
for public water systems are in place.
x A person knowledgeable of the chemigation system and responsible for its operation, or
under the supervision of the responsible person, shall shut the system down and make
necessary adjustments when needed.

4.6.2 Operating Instructions For Chemigation
1. The system must contain a functional check-valve, vacuum relief valve, and low pressure
drain appropriately located on the irrigation pipeline to prevent water-source
contamination from backflow.
2. The pesticide injection pipeline must contain a functional, automatic, quick-closing check-
valve to prevent the flow of fluid back toward the injection pump.
3. The pesticide injection pipeline must also contain a functional, normally closed, solenoid-
operated valve located on the intake side of the injection pump and connected to the

Dual Magnum Herbicide
16

system interlock to prevent fluid from being withdrawn from the supply tank when the
irrigation system is either automatically or manually shut down.
4. The system must contain functional interlocking controls to automatically shut off the
pesticide injection pump when the water pump motor stops.
5. The irrigation line or water pump must include a functional pressure switch which will stop
the water pump motor when the water pressure decreases to the point where pesticide
distribution is adversely affected.
6. Systems must use a metering pump, such as a positive displacement injection pump
(e.g., diaphragm pump or piston pump), effectively designed and constructed of materials
that are compatible with pesticides and capable of being fitted with a system interlock.
7. Do not apply when wind speed favors drift beyond the area intended for treatment.

4.6.3 Specific Instructions For Public Water Systems
1. Public water system means a system for the provision to the public of piped water for
human consumption if such system has at least 15 service connections or regularly
serves an average of at least 25 individuals daily at least 60 days out of the year.
2. Chemigation systems connected to public water systems must contain a functional,
reduced-pressure zone (RPZ), back-flow preventer or the functional equivalent in the
water supply line upstream from the point of pesticide introduction. As an option to the
RPZ, the water from the public water system should be discharged into a reservoir tank
prior to pesticide introduction. There shall be a complete physical break (air gap) between
the outlet end of the fill pipe and the top or overflow rim of the reservoir tank of at least
twice the inside diameter of the fill pipe.
3. The pesticide injection pipeline must contain a functional, automatic, quick-closing check
valve to prevent the flow of fluid back toward the injection pump.
4. The pesticide injection pipeline must contain a functional, normally closed, solenoid-
operated valve located on the intake side of the injection pump and connected to the
system interlock to prevent fluid from being withdrawn from the supply tank when the
irrigation system is either automatically or manually shut down.
5. The system must contain functional interlocking controls to automatically shut off the
pesticide injection pump when the water pump motor stops, or in cases where there is no
water pump, when the water pressure decreases to the point where pesticide distribution
is adversely affected.
6. Systems must use a metering pump, such as a positive displacement injection pump
(e.g., diaphragm pump) effectively designed and constructed of materials that are
compatible with pesticides and capable of being fitted with a system interlock.
7. Do not apply when wind speed favors drift beyond the area intended for treatment.

4.6.4 Application Directions For Irrigation Systems
1. Prepare a mixture with a minimum of 1 part water to 1 part herbicide(s) and inject this
mixture into the center pivot system. Injecting a larger volume of a more dilute mixture
per hour will usually provide more accurate calibration of equipment.
2. Maintain sufficient agitation to keep the herbicide in suspension.
3. Meter into irrigation water during entire period of water application.

Dual Magnum Herbicide
17

4. Apply in ½-1 inch of water. Use the lower water volume (½ inch) on coarser soils and the
higher volume (1 inch) on fine textured soils. More than 1 inch of water at application may
reduce weed control by moving the herbicide below the effective zone in the soil.

4.6.5 Center Pivot Irrigation Application
x Dual Magnum Herbicide alone or in tank mixture with other herbicides on this label, which
are registered for center pivot application, may be applied in irrigation water
preemergence (after planting, but before weeds or crop emerge) at rates listed on this
label.
x Dual Magnum Herbicide also may be applied postemergence to the crop and
preemergence to weeds in crops where postemergence applications are allowed on this
label.
x Follow all restrictions (height, timing, rate, etc.) to avoid illegal residues.
x Apply this product only through a center pivot irrigation system.
x Crop injury, lack of effectiveness, or illegal pesticide residues in the crop can result from
non-uniform distribution of treated water.

Where sprinkler distribution patterns do not overlap sufficiently, unacceptable weed control
may result. Where sprinkler distribution patterns overlap excessively, crop injury may result.

4.7 Sprayer Cleanout
Thoroughly clean sprayer or other application device before using. Dispose of cleaning
solution in a responsible manner. Do not use a sprayer or applicator contaminated with any
other materials, or crop damage or clogging of the application device may result.
5.0 REPLANT AND ROTATIONAL CROPS
5.1 Replant and Rotational Crops
x If a crop treated with Dual Magnum Herbicide is lost, any crop on this label, or on a
supplemental Dual Magnum Herbicide label, may be replanted or rotated at any interval
provided that the rate of Dual Magnum Herbicide applied to the previous crop was not
greater than the labeled rate for the crop to be replanted.
x Dual Magnum Herbicide may be applied again following crop replanting provided the total
annual maximum rate for that crop is not exceeded.

The crops listed in the table below and in Section 5.2 may be planted at the specified interval
following application of Dual Magnum Herbicide Herbicide.

Crop Plant-Back Interval
Alfalfa 4 months
Barley
Oats
Rye
Wheat
4 ½ months

Clover (seeded) 9 months
Buckwheat Next spring following treatment

Dual Magnum Herbicide
18

Rice
Tobacco
All other crops not listed above or in Section 5.2. 12 months
Precaution:
x Refer to Section 5.3 for rotational crop instructions when water or irrigation is limited.
ROTATIONAL CROPS USE RESTRICTION
1. DO NOT rotate to alfalfa or clover for 12 months if more than 1.9 lb active ingredient per acre (2.0 pt
of Dual Magnum Herbicide) was applied in the previous crop.


5.2 Additional Rotational Crop Options
This is a listing of rotational crop options that are made possible through S-metolachlor
tolerances which were established by the EPA as crop groupings.
For the crop groups and crop subgroups below, not all crops within each group are
specifically listed. Where a crop group or crop subgroup is listed, the plant-back interval
applies to all the respective crops in that specific EPA crop group or EPA crop subgroup.
Crop Group or Crop Subgroup Maximum Rate
Previously Applied
to the Field (pt/A)
Plant-Back
Interval
Cilantro
Spinach
1.0 60 days
Subgroup 1B: Vegetable root (except sugar beet, except carrot)
1.33 60 days

Beet, garden
Burdock, edible
Celeriac
Chervil, turnip-rooted
Chicory
Ginseng
Horseradish
Parsley, turnip-rooted

Parsnip
Radish
Radish, oriental
Rutabaga
Salsify
Salsify, black
Salsify, Spanish
Skirret
Turnip

Subgroup 3-07B: Onion, green
Chive
Chive, Chinese
Leek, lady’s
Leek
Leek, wild

Onion,
Beltsville
bunching
Onion, fresh
Onion, green
Onion, Welsh
Shallot

Subgroup 4-16B: Brassica, leafy greens
Bok choy
Broccoli, Chinese
Broccoli, Cavolo
Cabbage, Chinese (napa)
Collards

Kale
Greens,
mustard
Greens, turnip
Crop Group 9: Vegetable, cucurbit
Cantaloupe Squash,

Dual Magnum Herbicide
19

Citron Melon
Cucumber
Gourd
Muskmelon
Pumpkin
Summer
Squash,
Winter
Watermelon


Carrot
Leaf Lettuce
Sesame
Strawberry
Swiss Chard
1.33 60 days
Group 8-10: Vegetable fruiting (except tabasco pepper)
1.67 60 days
Eggplant
Groundcherry (Physalis spp.)
Okra
Pepino
Pepper, bell
Pepper, chili
Pepper,
cooking
Pepper,
pimento
Pepper, sweet
Tomatillo
Tomato

Subgroup 1C: Tuberous and Corm Vegetables
2.0 60 days
Arracacha
Arrowroot
Artichoke, Chinese
Artichoke, Jerusalem
Canna, edible
Cassava, bitter
Cassava, sweet
Chayote (root)
Chufa
Dasheen (taro)
Ginger
Leren
Potato
Potato, sweet
Tanier
Turmeric
Yam bean
Yam, true

Subgroup 3-07A: Onion, bulb
Garlic, bulb
Garlic, great headed
Onion, dry
bulb
Shallot

Subgroup 22A: Stalk and stem vegetable (except Kohlrabi)
Agave
Asparagus
Celtuce

Fennel,
Florence
Fern, edible
Kale, sea
Subgroup 22B: Leaf petiole vegetable
Cardoon
Celery, Chinese

Celery
Rhubarb
Subgroup 5-16: Vegetable, Brassica, head and stem
Broccoli
Brussel sprouts
Cabbage

Cabbage,
Chinese
Cauliflower

Kohlrabi
Lettuce, head
Precaution:
x Refer to Section 5.3 for rotational crop instructions when water or irrigation is limited.
ADDITIONAL ROTATIONAL CROP USE RESTRICTIONS

Dual Magnum Herbicide
20

1. DO NOT make a second application of an S-metolachlor-containing product to these rotational crops
within 60 days of the original application.
2. If the rate of Dual Magnum Herbicide applied in the previous crop was greater than the rate listed in
the table, these crops cannot be planted until the following spring.

5.3 Limited Water or Irrigation Conditions
When planting rotational crops, special attention must be given to the amount of rainfall and
type of irrigation used. Rotational crops listed on this label are safe for planting after a Dual
Magnum
 Herbicide application provided the rotational interval is followed and the preceding
crop received natural rainfall or overhead irrigation.
When non-overhead watering methods (e.g. drip tape, furrow irrigation, etc.) are used, the
areas of the field not receiving water (e.g. furrows when drip irrigated or bed tops when
furrow irrigated) will have a higher Dual Magnum Herbicide residue remaining in the soil
resulting in a significant increase in the rotational crop injury risk.
To reduce the risk of rotational crop injury, thoroughly incorporate the Dual Magnum
Herbicide treated field to a depth of 3-4 inches before planting the rotational crop. For more
thorough incorporation, till the soil in 2 different directions (cross-till). Even with thorough
tillage, injury to rotational crops is still possible following non-overhead watering methods or
limited moisture conditions.

6.0 COVER CROPS
A cover crop can be an important tool for the overall farm cropping system. Cover crops are
planted for conservation purposes, soil erosion control, soil health improvement, water quality
improvement and weed management. A cover crop can be a single crop or a combination of
crops, including grasses and/or broadleaf crops.
After harvest of a Dual Magnum
 Herbicide treated crop, planting of a cover crop is allowed
provided the cover crop is not grazed or fed to livestock nor harvested for food. Terminate
the cover crop through natural causes such as frost or intentional termination by herbicide
application, crimping, rolling, tillage or cutting.
All possible cover crops or cover crop combinations have not been tested for tolerance to this
product. Before planting the cover crop, determine the level of tolerance for the intended
cover crops by conducting a field bioassay. Refer to Section 6.1 for instructions on how to
conduct a field bioassay.

6.1 Field Bioassay for Cover Crops
A field bioassay is a method of determining if herbicide residues are present in the soil at
concentrations high enough to adversely affect crop growth.

Dual Magnum Herbicide
21

Conduct the field bioassay by planting several strips of the desired cover crop across the field
which has been previously treated with Dual Magnum Herbicide. Plant the cover crop strips
perpendicular to the direction of the product application. The strips should be located so that
all the different field conditions are encountered, including differences in field terrain, soil
texture, organic matter, pH, and drainage.

If the cover crop does not show adverse effects such as crop injury and/or stand reduction,
the field can be planted to this cover crop. If injury and/or stand reduction are visible, wait
two to four weeks for further herbicide degradation to occur and repeat the bioassay.
Alternatively, select a different cover crop and repeat the bioassay. Only plant cover crops
that show acceptable tolerance in the field bioassay.

7.0 RESTRICTIONS AND PRECAUTIONS
7.1 Use Restrictions
x DO NOT sell, use or distribute this product in Nassau and Suffolk Counties in the State of
New York.
x DO NOT use in nurseries, turf, or landscape plantings.
x DO NOT apply this product through any type of irrigation system except center pivot
systems.

7.2 Use Precautions
x Avoid making applications under conditions which favor runoff or wind erosion of soil
containing this product to non-target areas.
x To prevent off-site movement due to runoff or wind erosion:
o Avoid treating powdery dry or light sand soils when conditions are favorable for
wind erosion. Under these conditions, settle the soil surface first by rainfall or
irrigation.
o Avoid applications to impervious substrates, such as paved or highly compacted
surfaces.
o Avoid use of tailwater from the first flood or furrow irrigation of treated fields to treat
non-target crops, unless at least 1/2 inch of rainfall has occurred between
application and the first irrigation.
x Avoid using a sprayer or applicator contaminated with any other materials, or crop
damage or clogging of the application device may result.
x Avoid spray overlap, as crop injury may result.
x Injury may occur following the use of Dual Magnum
 Herbicide under abnormally high soil
moisture conditions during early development of the crop.
x Dry weather following application of Dual Magnum Herbicide may reduce weed control.
Cultivate if weeds develop.
x To avoid crop injury, avoid the use of a herbicide/fertilizer mixture on crops where bedding
occurs.
x Avoid application to humans or animals. Flagmen and loaders must avoid inhalation of

Dual Magnum Herbicide
22

spray mist and prolonged contact with skin.

7.3 Mandatory Spray Drift Management
Aerial Applications:
x Do not release spray at a height greater than 10 ft above the ground or
vegetative canopy, unless a greater application height is necessary for pilot
safety.
x
 Applicators are required to select the nozzle and pressure that deliver medium
or coarser droplets (ASABE S641).
x If the wind speed is 10 miles per hour or less, applicators must use ½ swath
displacement upwind at the downwind edge of the field. When the wind speed
is between 11-15 miles per hour, applicators must use ¾ swath displacement
upwind at the downwind edge of the field.
x Do not apply when wind speeds exceed 15 mph at the application site. If the
wind speed is greater than 10 mph, the boom length must be 65% or less of the
wingspan for fixed wing aircraft and 75% or less of the rotor diameter for
helicopters. Otherwise, the boom length must be 75% or less of the wingspan
for fixed-wing aircraft and 90% or less of the rotor diameter for helicopters.
x Do not apply during temperature inversions.

Ground Boom Applications:
x User must only apply with the release height recommended by the
manufacturer, but no more than 4 feet above the ground or crop canopy.
x Applicators are required to select the nozzles and pressure that deliver medium
or coarser droplets (ASABE S572).
x Do not apply when wind speeds exceed 15 miles per hour at the application
site.
x Do not apply during temperature inversions.

Boomless Ground Applications:
x Applicators are required to select the nozzle and pressure that deliver medium
or coarser droplet size (ASABE S572.3) for all applications.
x Do not apply when wind speeds exceed 15 miles per hour at the application
site.
x Do not apply during temperature inversions.


7.4 SPRAY DRIFT ADVISORIES

THE APPLICATOR IS RESPONSIBLE FOR AVOIDING OFF-SITE SPRAY DRIFT. BE
AWARE OF NEARBY NON-TARGET SITES AND ENVIRONMENTAL CONDITIONS.

Dual Magnum Herbicide
23

7.4.1 Importance of Droplet Size
x An effective way to reduce spray drift is to apply large droplets.
x Use the largest droplets that provide target pest control.
x While applying larger droplets will reduce spray drift, the potential for drift will be greater if
applications are made improperly or under unfavorable environmental conditions.
7.4.2 Controlling Droplet Size – Ground Boom
x Volume – Increasing the spray volume so that larger droplets are produced will reduce
spray drift. Use the highest practical spray volume for the application. If a greater spray
volume is needed, consider using a nozzle with a higher flow rate.
x Pressure – Use the lowest spray pressure recommended for the nozzle to produce the
target spray volume and droplet size.
x Spray nozzle – Use a spray nozzle that is designed for the intended application. Consider
using nozzles designed to reduce drift.

7.4.3 Controlling Droplet Size – Aircraft
x Adjust Nozzles – Follow nozzle manufacturers’ recommendations for setting up nozzles
generally, to reduce fine droplets, nozzles should be oriented parallel with the airflow in
flight.

7.4.4 Release Height - Aircraft
x Higher release heights increase the potential for spray drift.

7.4.5 Boom Height - Ground boom
x For ground equipment, the boom should remain level with the crop and have minimal
bounce.
.

7.4.6 Boomless Ground Applications
x Setting nozzles at the lowest effective height will help to reduce the potential for spray
drift.

7.4.7 Shielded Sprayers
x Shielding the boom or individual nozzles can reduce spray drift. Consider using shielded
sprayers. Verify that the shields are not interfering with the uniform deposition of the spray
on the target area.

Dual Magnum Herbicide
24

7.4.8 Temperature and Humidity
x When making applications in hot and dry conditions, use larger droplets to compensate
for evaporation.

7.4.9 Temperature Inversions
x Drift potential is high during a Temperature Inversion.
x Temperature inversions are characterized by increasing temperatures with altitude and
are common on nights with limited cloud cover and light to no wind.
x They begin to form as the sun sets and often continue into the morning.
x The presence of an inversion can be indicated by ground fog or by the movement of
smoke from a ground source or an aircraft smoke generator.
x Smoke that layers and moves laterally in a concentrated cloud (under low wind
conditions) indicates an inversion, while smoke that moves upward and rapidly dissipates
indicates good vertical air mixing.
x Avoid applications during temperature inversions.

7.4.10 Wind
x Drift potential generally increases with wind speed.
x AVIOD APPLICATIONS DURING GUSTY WIND CONDITIONS.
x Applicators need to be familiar with local wind patterns and terrain that could affect spray
drift.

7.4.11 Windblown Soil Particles
x Dual Magnum Herbicide has the potential to move off-site due to wind erosion.
x Soils that are subject to wind erosion usually have a high silt and/or fine to very fine sand
fractions and low organic matter content.
x Other factors which can affect the movement of windblown soil include the intensity and
direction of prevailing winds, vegetative cover, site slope, rainfall, and drainage patterns.
x Avoid applying Dual Magnum Herbicide if prevailing local conditions may be expected to
result in off-site movement.

7.4.12 Sensitive Areas
x This pesticide may only be applied when the potential for drift to adjacent sensitive areas
(e.g., residential areas, bodies of water, non-target plants) is minimal (i.e., when the wind
is blowing away from the sensitive area).
x To assure that spray will not adversely affect adjacent sensitive nontarget plants, apply
Dual Magnum Herbicide by aircraft at a minimum upwind distance of 400 ft from sensitive
plants.

Dual Magnum Herbicide
25

8.0 WEEDS CONTROLLED OR PARTIALLY CONTROLLED BY
DUAL MAGNUM HERBICIDE APPLIED PRIOR TO WEED
EMERGENCE
PARTIAL WEED CONTROL
Where reference is made to weeds partially controlled, partial control can either mean erratic
control from good to poor, or consistent control at a level below that generally considered
acceptable for commercial weed control. Control of these weeds can be erratic, due partially
to variable weather conditions.


Common Name Scientific Name
Weed
Type
Control (C) or Partial
Control (PC)
Barnyardgrass Echinochloa crus-galli Grass C
Crabgrass, large Digitaria ischaemum Grass C
Crabgrass, smooth Digitaria sanguinalis Grass C
Crowfootgrass Dactyloctenium aegyptium Grass C
Cupgrass, Prairie Eriochloa contracta Grass C
Cupgrass, Southwestern Eriochloa acuminata Grass C
Cupgrass, woolly Eriochloa villosa Grass PC
Foxtail, bristly Setaria verticillata Grass C
Foxtail, giant Setaria faberi Grass C
Foxtail, green Setaria viridis Grass C
Foxtail, millet Setaria italica Grass C
Foxtail, yellow Setaria pumila Grass C
Goosegrass Eleusine indica Grass C
Johnsongrass (seedling) Sorghum halepense Grass PC
Millet, wild-proso Panicum miliaceum Grass PC
Panicum, fall Panicum dichotomiflorum Grass C
Panicum, Texas Panicum texanum Grass PC
Rice, red Oryza sativa Grass C
Sandbur, field Cenchrus spinifex Grass PC
Ryegrass, Italian Lolium multiflorum Grass C
Sandbur, Southern Cenchrus echinatus Grass PC
Shattercane Sorghum bicolor Grass PC
Signalgrass, broadleaf Urochloa platyphylla Grass C
Sorghum (volunteer) Sorghum bicolor Grass PC
Witchgrass Panicum capillare Grass C
Amaranth, Palmer Amaranthus palmeri Broadleaf C
Amaranth, Powell Amaranthus powellii Broadleaf C
Beggarweed, Florida Desmodium tortuosum Broadleaf PC
Carpetweed Mollugo verticillata Broadleaf C
Eclipta Eclipta prostrata Broadleaf PC

Dual Magnum Herbicide
26

Common Name Scientific Name
Weed
Type
Control (C) or Partial
Control (PC)
Galinsoga, hairy Galinsoga quadriradiata Broadleaf C
Galinsoga, smallflower Galinsoga parviflora Broadleaf C
Nightshade, Eastern black Solanum ptychanthum Broadleaf C
Nightshade, hairy Solanum physalifolium Broadleaf PC
Pigweed, prostrate Amaranthus blitoides Broadleaf C
Pigweed, redroot Amaranthus retroflexus Broadleaf C
Pigweed, smooth Amaranthus hybridus Broadleaf C
Pigweed, tumble Amaranthus albus Broadleaf C
Purslane, common Portulaca oleracea Broadleaf PC
Pusley, Florida Richardia scabra Broadleaf C
Spiderwort, tropical Commelina benghalensis Broadleaf C
Waterhemp Amaranthus tuberculatus Broadleaf C
Nutsedge, yellow Cyperus esculentus Sedge C
Procedures that might improve control of weeds listed above:
x Thoroughly till soil to destroy germinating and emerged weeds prior to preemergence or preplant
applications.
x If Dual Magnum Herbicide is to be used preemergence, apply at planting or immediately after
planting.
x If available, sprinkler irrigate within 2 days after application. Apply ½-1 inch of water. Use lower
water volume (½ inch) on coarse textured soils and higher volume (1 inch) on fine textured soils.
x If irrigation is not possible and rain does not occur within 2 days after planting and application,
weed control may be decreased. Under these conditions, make a uniform, shallow cultivation as
soon as weeds emerge or apply an appropriately labeled herbicide to control emerged weeds.

9.0 CROP USE DIRECTIONS
SOIL TEXTURES
Where rates are based on coarse, medium, or fine textured soils, it is understood that soil
textural classes are generally categorized as follows:
Coarse Medium Fine
Sand
Loamy Sand
Sandy Loam
Sandy Clay
Sandy Clay Loam

Loam
Silt Loam
Silt
Clay
Clay Loam
Silty Clay
Silty Clay Loam

Dual Magnum Herbicide
27

9.1 Corn
9.1.1 Fall, Preplant Surface, Preplant Incorporated, Preemergence or
Postemergence Applications
Crops (including cultivars, varieties, and/or hybrid of these)
Field Corn Popcorn Seed Corn Sweet Corn
Application
Timing
Rate
(pt/A) Use Directions
Fall Application
for Spring Weed
Control

For use in the
following states:
Iowa
Illinois
Minnesota
Nebraska
North Dakota
South Dakota
Wisconsin
For minimum-till or no-
tillage systems on soils
with > 2.5% organic
matter, apply rate based
on soil texture:

Medium Soils:
Apply 1.67-2.0 pt/A

Fine Soils:
Apply 2.0 pt/A
Apply after harvest when the sustained soil
temperature at a 4-inch depth is less than 55° F and
falling.

Apply to ground that will be planted to corn the
following spring.

Apply after September 30 in ND, SD, MN, WI and
north of Route 30 in IA.

Apply after October 15 North of Route 91 in NE
and south of Route 30 in IA.

Apply after October 31 North of Route 136 in IL.

When a fall and/or a spring tillage follows application,
do not exceed an incorporation depth of 2-3 inches.

Minimize furrow and ridge formation in the tillage
operations.
Fall Application
for Residual
Control of
Glyphosate
Resistant Italian
Ryegrass (Lolium
multiflorum)

1.33 - 1.67 pt/A

Use the lower rate for
coarse textured soils and
the higher rate for fine
textured soils.

Apply from September 1 – December 1 after harvest
of the previous crop and prior to Italian ryegrass
emergence.

If tillage follows application, do not incorporate to a
depth greater than 2-3 inches.

If glyphosate resistant Italian ryegrass is emerged at
the time of application, a paraquat brand herbicide
can be tank-mixed with Dual Magnum Herbicide to
control emerged ryegrass.

Other registered herbicides may be tank mixed with
Dual Magnum Herbicide for control or improved
control of other weeds present at the time of
application.
Fall Application
for Residual
Control or
Suppression of
Yellow Nutsedge
(Cyperus
esculentus) the
Following Spring
in ID, OR and WA

1.33 pt/A Apply in the fall after the harvest of the previous crop
but before freeze-up.

Application can be surface-applied or incorporated.

If tillage follows application, do not incorporate to a
depth greater than 2-3 inches.

Dual Magnum Herbicide
28

Early Preplant
Surface
Application

1.33 pt/A on coarse soils

1.67 pt/A on medium soils

2.0 pt/A on fine soils

For extended residual or
control of heavy weed
infestations, up to 2.6 pt/A
is allowed.

Apply up to 14 days prior to planting on coarse soils.

Apply up to 30 days before planting, on medium- and
fine textured soils.


Preplant
Incorporated

For all applications use the
rate for the specific soil
texture and organic matter
(OM) as follows:

Coarse Soils:
1.0-1.33 pt/A; <3% OM
1.33 pt/A; > 3% OM

Medium Soils:
1.33-1.67 pt/A

Fine Soils:
1.33-1.67 pt/A; <3% OM
1.67-2.0 pt/A; > 3% OM

For extended residual or
control of heavy weed
infestations, up to 2.6 pt/A
is allowed.
Apply within 14 days of planting.

Apply to the soil and incorporate into the top 2 inches
of soil.

Use a preplant incorporated application if furrow
irrigation is used or when a period of dry weather
after application is expected.

 If crop will be planted on beds, apply and
incorporate after bed formation, unless specified
otherwise.

For California Only: Broadcast Dual Magnum
Herbicide alone or with tank mix partners to the soil
and thoroughly incorporate with a disk or similar
implement set to till 4-6 inches deep. For more
thorough incorporation, till the soil in 2 different
directions (cross-till). Corn may be planted on flat
surface or on beds. Use caution when forming the
beds to ensure that only soil from the treated zone is
used (i.e., do not bring untreated soil to soil surface).
If application is made to preformed beds, incorporate
with a tillage implement set to till 2-4 inches deep.
Use care during tilling to keep the treated, tilled soil
on the beds.
Preemergence For all applications use the
rate for the specific soil
texture and organic matter
(OM) as follows:

Coarse Soils:
1.0-1.33 pt/A; <3% OM
1.33 pt/A; > 3% OM

Medium Soils:
1.33-1.67 pt/A

Fine Soils:
1.33-1.67 pt/A; <3% OM
1.67-2.0 pt/A; > 3% OM

For extended residual or
control of heavy weed
infestations, up to 2.6 pt/A
is allowed.
Apply after planting but before crop emerges.

For California Only: Apply after planting. Water
with sprinkler or flood irrigation within 7-10 days.

Dual Magnum Herbicide
29

Postemergence
or Lay-By

1.0 - 2.0 pt/A Apply after corn emergence up until corn reaches 40
inches in height.

Apply to extend the duration of weed control in corn
following any preplant surface-applied, preplant
incorporated, or preemergence herbicide application,
including Dual Magnum Herbicide.

For best results, make applications prior to weed
emergence and directed toward the base of corn
plants in excess of 5 inches tall.
For Weed Control:
x Refer to Section 8.0 for list of weeds controlled or partially controlled.
Tank Mix or Sequential Application Options:
x Refer to Section 9.1.2 for tank-mix options.
 Resistance Management:
x Refer to Section 3.1.
Precautions:
x For preplant surface application, to the extent possible, avoid moving treated soil out of the row or
moving untreated soil to the surface during planting or weed control will be diminished.
x Use on peat or muck soils will result in reduced weed control.
USE RESTRICTIONS
1) Refer to Section 7.1 for additional product use restrictions.
2) Maximum Single Application Rate: 2.6 pt/A
a. DO NOT apply more than 2.6 pt/A in a single preemergence application - (2.48 lb ai/A of S-
metolachlor).
b. DO NOT apply more than 2.0 pt/A in a single postemergence application - (1.91 lb ai/A of S-
metolachlor).
3) Minimum Application Interval: Not Applicable
4) Maximum Annual Rate: 3.9 pt/A/year - (3.71 lb ai/A/year of S-metolachlor)
a. DO NOT exceed 3.71 lb ai/A/year of S-metolachlor-containing products.
5) The combined total amount of Dual Magnum Herbicide from all applications in the fall plus spring
must not exceed the maximum allowed annual rate.
6) DO NOT make more than 1 fall application per crop.
7) DO NOT apply to frozen ground.
8) DO NOT graze or feed forage for 30 days following application.
9) Preharvest Interval (PHI):
a. Sweet corn ears: 30 days

9.1.2 Tank-Mix Combinations for Corn
Application Tank-Mix Brands Use Directions
Burndown Weed
Control
2,4-D
AAtrex® brands
Banvel®
Gramoxone® brands
Solo glyphosate
brands
Princep® brands


Apply before, during or after planting, but before corn
emerges.

Apply solo glyphosate brands in water or fluid fertilizer
with ground equipment.

Gramoxone brands will not control weeds taller than 6
inches.

Apply AAtrex tank mixture before weeds exceed 3
inches in height.

Dual Magnum Herbicide
30

Add non-ionic surfactant (NIS) at 1.0-2.0 qt/100 gal of
diluted spray, or another appropriate surfactant at its
labeled rate, or add crop oil concentrate plus 28%
liquid nitrogen (or equivalent).
Preplant Surface
Preplant
Incorporated
Preemergence
AAtrex brands
Balance® Flexx
Princep brands

These tank mixes may be used to broaden the weed
control spectrum in corn beyond that of Dual Magnum
Herbicide alone.

Use the Balance Flexx mixture on field corn only.
Postemergence

AAtrex brands
Status®

Apply before grass and broadleaf weeds pass the 2-
leaf state and before corn exceeds 12 inches in
height. Application to weeds larger than the 2-leaf
stage will generally result in unsatisfactory control.

Occasionally, some corn leaf burn may result, but this
will likely not affect later growth or yield.

Do not apply the postemergence tank mixes in fluid
fertilizer, or severe crop injury may occur.
Postemergence
Application to
Glufosinate
Resistant Corn
Liberty®


This tank mix provides postemergence control of a
broad spectrum of grass and broadleaf weeds on the
Liberty label and residual control of weeds on the
Dual Magnum Herbicide label.

Refer to the solo Dual Magnum Herbicide label and
the Liberty label for rates recommended for weed
populations and soil texture.

Apply only to corn that is resistant to glufosinate.
Postemergence
Application to
Glyphosate
Resistant Corn
Solo glyphosate
brands

These tank mixes provide postemergence control of
weeds on the glyphosate brand label and residual
control of weeds on the Dual Magnum Herbicide label.

Application may be made from corn emergence until
30 inches tall or the V8 stage (8 leaves with collars),
whichever comes first.

Refer to the solo Dual Magnum Herbicide label and
the glyphosate brands label for rates recommended
for weed populations and soil texture.

Apply only to corn that is resistant to glyphosate.
See Appendix 12.1 for the EPA Registration Number and Active Ingredient(s) in each listed brand.
Precautions:
x Dual Magnum Herbicide in any tank mixture for corn may be applied in water or fluid fertilizer before
corn emerges. After corn emergence, use only water as a carrier when Dual Magnum Herbicide is
applied.
x Do not apply combinations containing paraquat brands in suspension-type liquid fertilizers, because
the activity of paraquat will be reduced.
TANK-MIX USE RESTRICTIONS
1) All application rates, precautions, and use restrictions cited in Section 9.1.1 for Dual Magnum
Herbicide solo apply to tank-mixes with Dual Magnum Herbicide.
2) It is the pesticide user’s responsibility to ensure that all products are registered for the intended use.
Read and follow the applicable restrictions and limitations and directions for use on all product
labels involved in tank mixing. Users must follow the most restrictive directions for use and
precautionary statements of each product in the tank mixture.

Dual Magnum Herbicide
31

3) IMPORTANT: FOR TANK MIXTURES WITH AATREX (OR OTHER BRANDS OF ATRAZINE)
a. If applying Dual Magnum Herbicide in tank mixture with AAtrex, all the restrictions and rate
limitations on the AAtrex label must be followed.
b. Certain states may have established rate limitations for atrazine within specific geographical
areas. Consult your state lead pesticide control agency for additional information. It is a
violation of this label to deviate from state use regulations.
c. DO NOT exceed a total of 2.5 lb ai/A/year of atrazine-containing products.

9.2 Cotton
9.2.1 Fall, Preplant Incorporated, Preemergence or Postemergence
Applications
Crops (including cultivars, varieties, and/or hybrids of these)
Cotton
Application
Timing
Rate
(pt/A) Use Directions
Fall Application
for Residual
Control of
Glyphosate
Resistant Italian
Ryegrass
(Lolium
multiflorum)

1.33 - 1.67 pt/A

Use the lower rate for
coarse textured soils and
the higher rate for fine
textured soils.

Apply from September 1 – December 1 after harvest
of the previous crop and prior to Italian ryegrass
emergence.

If tillage follows application, do not incorporate to a
depth greater than 2-3 inches.

If glyphosate resistant Italian ryegrass is emerged at
the time of application, a paraquat brand herbicide
can be tank-mixed with Dual Magnum Herbicide to
control emerged ryegrass.
Preplant
Incorporated
(NM, OK and TX
Only)

Use the following rates for
the specific soil type:

Sandy Loam Soils:
1.0 pt/A

Medium Soils:
1.0-1.33 pt/A

Fine Soils:
1.33 pt/A
Apply to the soil and incorporate into the top inch of
soil. Use a rolling cultivator or similar implement to
uniformly incorporate not more than 1 inch deep.

Use a preplant incorporated application if furrow
irrigation is used or when a period of dry weather after
application is expected.

Where furrow irrigation is used, wet the top of the bed
for best results.

If the crop is to be planted on beds, apply and
incorporate after bed formation.

Plant cotton below the zone of incorporation; i.e., at
least 1 inch on fine soils and 1.5 inches on coarse and
medium soils.

If incorporated prior to planting, use a planter that will
result in a minimum of soil disturbance.
Preemergence
(AR, KS, LA, MS,
TN and Bootheel
of MO Only)

Use the following rates for
the specific soil type in
AR, KS, LA, MS, TN, and
Bootheel of MO only:

Sandy Loam Soils:
0.5 - 1.0 pt/A

Apply at planting or after planting, but before crop
emerges.

If the crop is to be planted on beds, apply after bed
formation.

Dual Magnum Herbicide
32

Medium Soils:
0.66 -1.33 pt/A

Fine Soils:
1.0 - 1.33 pt/A
Preemergence
(NM, OK and TX
Only)

Use the following rates for
the specific soil type in
NM, OK and TX only:

Sandy Loam Soils:
1.0 pt/A

Medium Soils:
1.0 - 1.33 pt/A

Fine Soils:
1.33 pt/A
Apply at planting or after planting, but before crop
emerges.

If the crop is to be planted on beds, apply after bed
formation.
Postemergence

Use the postemergence
rates below based upon
the following geographical
areas:

VA, NC, SC, GA, FL, and
AL:
Apply at 1.0 – 1.33 pt/A

TN, AR, KS, MS, MO, and
LA:
Apply at 0.5 – 1.33 pt/A

TX, OK, NM, AZ, CA, and
Clay Soils in AR:
Apply at 1.0 – 1.33 pt/A
Apply broadcast over-the-top or directed to the soil
surface.

In sprinkler-irrigated areas, sprinkler irrigate after
application with ½ - 1 inch of water (1/2 inch on
coarse textured soils to 1 inch on fine textured soils)
to incorporate Dual Magnum Herbicide.

In furrow-irrigated areas, apply Dual Magnum
Herbicide, incorporate with a rolling cultivator or
similar implement that provides uniform shallow
incorporation (2 inches or less), and then irrigate.

In non-irrigated areas, if at least ½ inch of rainfall
does not occur within 10 days after application,
cultivate with a rolling cultivator or similar implement
that provides uniform shallow incorporation of Dual
Magnum Herbicide.
For Weed Control:
x Refer to Section 8.0 for list of weeds controlled or partially controlled.
Tank Mix Options:
x Refer to Section 9.2.2 for tank-mix options.
Resistance Management:
x Refer to Section 3.1.
Precautions:
x For best control of yellow nutsedge and suppression of seedling Johnsongrass, apply preplant
incorporated, preemergence, or postemergence to cotton and preemergence to weeds at the
maximum rate for the soil texture, whether applied alone or in combinations.
x To avoid concentration in the seed furrow, do not make broadcast applications to cotton planted in
furrows more than 2 inches deep. When making band applications to cotton planted in furrows
deeper than 2 inches, ensure that band width does not exceed the width of the bottom of the furrow.
x Applying over-the-top in fluid fertilizer or any other adjuvant, surfactant, oil, or other pesticide not
listed in the cotton section of this label may result in crop injury.
x In furrow-planted cotton, to avoid concentration in the furrow and potential injury, do not apply
postemergence until after first “knifing” or cultivation to level soil surface.
x Dual Magnum Herbicide will not control emerged weeds. Control emerged weeds with an
appropriate registered foliar herbicide or by mechanical means.
USE RESTRICTIONS
1) Refer to Section 7.1 for additional product use restrictions.

Dual Magnum Herbicide
33

2) Maximum Single Application Rate: 1.67 pt/A - (1.59 lb ai/A of S-metolachlor)
3) Minimum Application Interval: Not Applicable
4) Maximum Annual Rate: 2.6 pt/A/year - (2.48 lb ai/A/year of S-metolachlor)
a. DO NOT exceed 2.48 lb ai/A/year of S-metolachlor-containing products.
5) DO NOT apply on sand or loamy sand soils, or in areas where water is likely to “pond” over the bed.
6) DO NOT apply on Taloka silt loam.
7) DO NOT use in Gaines County, TX.
8) DO NOT apply to frozen ground.
9) The combined total amount of Dual Magnum Herbicide from all applications in the fall plus spring
must not exceed the maximum allowed annual rate.
10) Preharvest Interval (PHI):
a. 80 days after directed-postemergence application
b. 100 days after postemergence over-the-top application

9.2.2 Tank-Mix Combinations for Cotton
Application Tank-Mix Brands Use Directions
Burndown Cotoran® 4L
Gramoxone brands
Solo glyphosate brands

Use in applications where cotton is planted directly
into a cover crop, stale seedbed, or previous crop
residues.

Apply before, during or after planting, but before the
cotton emerges. Apply in a minimum of 15 gallons of
water or fluid fertilizer per acre with ground
equipment.
Preplant
Incorporated
Preemergence

Caparol® 4L


Apply as a mixture in water or liquid fertilizer.

For preplant incorporated applications, plant cotton
below the zone of incorporation. If incorporated
before planting, use a planter that will result in a
minimum of soil disturbance.
Preemergence Cotoran 4L Apply to the soil surface at planting or after planting,
but before weeds or crop emerge.
Postemergence-
Directed
Caparol 4L

Tank mix in water only for postemergence-directed
application in AR, AZ, CA, LA, MS, NM, OK, TN, TX
and MO.

Apply the tank mix in a minimum of 15 gallons of
spray volume per acre. Only use water as a carrier
for postemergence applications.
Postemergence-
Directed
Semi-Directed
Over-the-Top
Spray
Cotoran 4L


Do not use fluid fertilizer as a carrier for
postemergence applications.

Tank mix may be applied postemergence to cotton
but preemergence to weeds or postemergence to
both cotton and weeds for control of weeds on the
Cotoran 4L label.
Postemergence
Application to
Glyphosate
Resistant Cotton
Solo glyphosate brands Apply as a tank mixture in water for control of
emerged weeds on the glyphosate labels and for
residual preemergence control of weeds listed on the
Dual Magnum Herbicide label.

Adding additional spray adjuvants, surfactants,
fertilizer additives, or other pesticides to a tank
mixture of Dual Magnum Herbicide + solo glyphosate

Dual Magnum Herbicide
34

brands applied postemergence can result in
unacceptable crop injury.

Apply only to cotton that is resistant to glyphosate.
Postemergence
Application to
Glufosinate
Resistant Cotton
Liberty Apply as a tank mixture in water for control of
emerged weeds on the Liberty label and for residual
preemergence control of weeds listed on the Dual
Magnum Herbicide label.

Apply only to cotton that is resistant to glufosinate.
See Appendix 12.1 for the EPA Registration Number and Active Ingredient(s) in each listed brand.
Tank Mix Instructions:
x Refer to Section 4.4 for tank-mix instructions.
Precautions:
x To avoid concentration in the seed furrow, do not make broadcast applications of Dual Magnum
Herbicide + Caparol 4L or Dual Magnum Herbicide + Cotoran DF to cotton planted in furrows more
than 2 inches deep. When making band applications to cotton planted in furrows deeper than 2
inches, ensure that the band width does not exceed the width of the bottom of the furrow.
x Do not apply Dual Magnum Herbicide + Caparol 4L postemergence over-the- top of cotton, or injury
may occur.
x For tank mixtures of Dual Magnum Herbicide or Dual Magnum Herbicide + Cotoran, if heavy rain
occurs soon after application, crop injury may result, especially in poorly drained areas where water
stands for several days, or where the seeding slit has not been properly closed.
x Do not apply combinations containing Gramoxone brands in suspension-type liquid fertilizers, as the
activity of paraquat will be reduced.
TANK-MIX USE RESTRICTIONS
1) All use restrictions cited in Section 9.2.1 for Dual Magnum Herbicide solo apply to tank-mixes with
Dual Magnum Herbicide.
2) It is the pesticide user’s responsibility to ensure that all products are registered for the intended use.
Read and follow the applicable restrictions and limitations and directions for use on all product labels
involved in tank mixing. Users must follow the most restrictive directions for use and precaut ionary
statements of each product in the tank mixture.

9.3 Grasses Grown for Seed
Crops (including cultivars, varieties, and/or hybrids of these)
Bentgrass
Fine fescue
Kentucky bluegrass
Orchardgrass
Perennial ryegrass
Tall fescue
Application
Timing
Rate
(pt/A) Use Directions
Established
Grasses Grown
for Seed Crops in
Idaho, Oregon
and Washington
Use the following rates for
the specific grass type:

Fine fescue and perennial
ryegrass:
Apply 1.0 pt/A

Bentgrass, Kentucky
bluegrass, orchardgrass
and tall fescue:
Apply 1.0 – 1.33 pt/A


Apply just before, during, or immediately following
the first fall rains or just before or during a late
summer or early fall irrigation, but before target
grasses emerge.

Evenly spread, remove, or burn the postharvest
residue (straw) before applying Dual Magnum
Herbicide.

In addition to controlling the weeds listed in Section
8.0, Dual Magnum Herbicide will provide
preemergence control/suppression of volunteer
seedlings of Bentgrass, fine fescue spp., Kentucky

Dual Magnum Herbicide
35

bluegrass, orchardgrass, perennial ryegrass and tall
fescue.

Dual Magnum Herbicide will also suppress or
control annual bluegrass, California brome,
doughstalk bluegrass, downy brome, Italian
ryegrass and rattail fescue.

Apply by ground equipment in a minimum of 10
gallons of water per acre at the recommended rate.
For Weed Control:
x Refer to Section 8.0 for list of weeds controlled or partially controlled.
Resistance Management:
x Refer to Section 3.1.
Precautions:
x Avoid application after the 15th of November or poor control may result.
x Tank mixtures with other pesticides, or the addition of an adjuvant, can increase the risk of crop
injury.
x Application to perennial ryegrass and fine fescue stands under stress may cause crop injury.
x If weed escapes occur following a Dual Magnum Herbicide application, an application of a
postemergence herbicide may be necessary to control escapes.
x Control may be decreased if excessive straw from the previous harvest is present at application
and/or insufficient rainfall/irrigation occurs.
x Dual Magnum Herbicide will not control emerged weeds. Control emerged weeds with an
appropriate registered foliar herbicide or by mechanical means.
USE RESTRICTIONS
1) Refer to Section 7.1 for additional product use restrictions.
2) The grass grown for seed crop must have at least one seed harvest or been established at least one
year prior to application.
3) Maximum Single Application Rate: 1.33 pt/A - (1.27 lb ai/A of S-metolachlor)
4) Minimum Application Interval: Not Applicable
5) Maximum Annual Rate: 1.33 pt/A/year - (1.27 lb ai/A of S-metolachlor)
a. DO NOT exceed 1.27 lb ai/A/year of S-metolachlor-containing products.
6) DO NOT apply Dual Magnum Herbicide more than once per crop year.
7) DO NOT graze forage regrowth for 60 days following application west of the Cascades.
8) DO NOT graze forage regrowth for 150 days following application in areas east of the Cascades.
9) Preharvest Interval (PHI):
a. Hay: harvest anytime between seed harvest and the next application of S-metolachlor.

9.4 Horseradish
Crops (including cultivars, varieties, and/or hybrids)
Horseradish
Application
Timing
Rate
(pt/A) Use Directions
Preemergence 1.0 – 1.33 pt/A

Use lower rates on soils
relatively coarse textured and
higher rates on fine textured
soils.
Apply a single broadcast application of Dual
Magnum Herbicide to the soil surface after
planting but before the crop emerges.
For Weed Control:
x Refer to Section 8.0 for list of weeds controlled or partially controlled.

Dual Magnum Herbicide
36

Resistance Management:
x Refer to Section 3.1.
Precaution:
x Dual Magnum Herbicide will not control emerged weeds. Control emerged weeds with an
appropriate registered foliar herbicide or by mechanical means.
USE RESTRICTIONS
1) Refer to Section 7.1 for additional product use restrictions.
2) Maximum Single Application Rate: 1.33 pt/A -(1.27 lb ai/A of S-metolachlor)
3) Minimum Application Interval: Not Applicable
4) Maximum Annual Rate: 1.33 pt/A/year - (1.27 lb ai/A of S-metolachlor)
a. DO NOT exceed 1.27 lb ai/A/year of S-metolachlor-containing products.
5) DO NOT apply Dual Magnum Herbicide more than once per crop year.
6) Preharvest Interval (PHI): normal timing for horseradish

9.5 Legume Vegetables (Succulent or Dried), Crop Group 6, except
Soybean [(NOT FOR POSTEMERGENCE AND OR CHEMIGATION
(CENTER PIVOT ONLY) USE IN CALIFORNIA)]
9.5.1 Fall, Preplant Incorporated, Preemergence, Postemergence and or
Chemigation (Center Pivot Only) Applications
Crops (including cultivars, varieties, and/or hybrids of these)
Edible Podded
(only):
 Jackbean
 Sword bean
 Soybean, (immature
seed)

Edible Podded,
Succulent Shelled or
Dried Shelled:
 Pigeon pea
 Bean (Phaseolus
spp.)
 Field bean
 Great Northern
 Kidney bean
 Lima bean
 Navy bean
 Pinto bean
 Runner bean
 Snap bean
Edible Podded,
Succulent Shelled or
Dried Shelled:
 Bean (Phaseolus
spp.) (continued)
 Tepary Bean
 Wax Bean

 Pea (Pisum spp.)
 Dwarf pea
 Edible-pod pea
 English pea
 Field pea
 Garden pea
 Green pea
 Snow pea
 Sugar snap pea


Edible Podded,
Succulent Shelled or
Dried Shelled:
(continued)

 Bean (Vigna spp.)
 Adzuki bean
 Asparagus bean
 Blackeyed pea
 Catjang
 Chinese longbean
 Cowpea
 Crowder pea
 Moth bean
 Mung bean
 Rice bean
 Southern pea
 Urd bean
Yardlong bean
Succulent Shelled or
Dried Shelled:
 Broad bean (fava bean)

Dried Shelled Only:
Chickpea (garbanzo
bean)
 Guar
 Lablab bean (hyacinth
bean)
 Grain lupin
 Sweet lupin
 White lupin
 White sweet lupin
 Lentils


Application
Timing
Rate
(pt/A) Use Directions
Fall Application
for Spring Weed
Control

For use in the
following states:
Iowa
Illinois
Minnesota
For minimum-till or no-
tillage systems on soils
with > 2.5% organic
matter, apply rate based
on soil texture:

Medium Soils:
Apply 1.67-2.0 pt/A

Apply after harvest when the sustained soil
temperature at a 4-inch depth is less than 55° F and
falling.

Apply after September 30 in ND, SD, MN, WI and
north of Route 30 in IA.

Apply after October 15 North of Route 91 in NE and
south of Route 30 in IA.

Dual Magnum Herbicide
37

Nebraska
North Dakota
South Dakota
Wisconsin
Fine Soils:
Apply 2.0 pt/A

Apply after October 31 North of Route 136 in IL.

When a fall and/or a spring tillage follows application,
do not exceed an incorporation depth of 2-3 inches.

Minimize furrow and ridge formation in the tillage
operations.
Preplant
Incorporated
For all applications use
the rate for the specific
soil texture and organic
matter (OM) as follows:

Coarse Soils:
1.0-1.33 pt/A; <3% OM
1.33 pt/A; > 3% OM

Medium Soils:
1.33-1.67 pt/A

Fine Soils:
1.33-1.67 pt/A; <3% OM
1.67-2.0 pt/A; > 3% OM
Apply to the soil and incorporate in the top 2 inches
within 14 days before planting using an implement
capable of providing uniform incorporation.

Use a preplant incorporated application if furrow
irrigation is used or when a period of dry weather after
application is expected.

If a crop will be planted on beds, apply and incorporate
after bed formation, unless specified otherwise.


For California Only for Beans, Peas and Lentils:
For preplant incorporation, broadcast alone or with
tank mix partners to the soil and thoroughly incorporate
with a disk or similar implement set to till 4-6 inches
deep. For more thorough incorporation, till the soil in 2
different directions (cross-till). Crops may be planted
on flat surface or on beds.

Use caution when forming the beds to ensure that only
soil from the treated zone is used (i.e., do not bring
untreated soil to soil surface). If application is made to
preformed beds, incorporate with a tillage implement
set to till 2-4 inches deep. Use care during tilling to
keep the treated, tilled soil on the beds.

Preemergence For all applications use
the rate for the specific
soil texture and organic
matter (OM) as follows:

Coarse Soils:
1.0-1.33 pt/A; <3% OM
1.33 pt/A; > 3% OM

Medium Soils:
1.33-1.67 pt/A

Fine Soils:
1.33-1.67 pt/A; <3% OM
1.67-2.0 pt/A; > 3% OM
Make preemergence applications after planting, but
before crop emerges.

For California Only for Beans, Peas and Lentils:
Apply after planting. Water with sprinkler or flood
irrigation within 7-10 days.
Postemergence
and or
Chemigation
(Center Pivot
Only)
For all applications use
the rate for the specific
soil texture and organic
matter (OM) as follows:

Coarse Soils:
1.0-1.33 pt/A; <3% OM
1.33 pt/A; > 3% OM
Apply Dual Magnum Herbicide postemergence or
chemigation only after the first trifoliate stage of
plant growth.

Application to plants with less than one trifoliate
can result in unacceptable crop injury.

Dual Magnum Herbicide
38


Medium Soils:
1.33-1.67 pt/A

Fine Soils:
1.33-1.67 pt/A; <3% OM
1.67-2.0 pt/A; > 3% OM
When applied broadcast over-the-top, crop injury
in the form of leaf spotting and speckling may be
observed, especially with rates greater than 1
pt/A.

DO NOT graze or harvest forage or hay following
postemergence applications.

Refer to Section 4.6 for chemigation restrictions
and directions.
For Weed Control:
x Refer to Section 8.0 for list of weeds controlled or partially controlled.
Tank Mix Application Options:
x Refer to Section 9.5.2 for preplant incorporated tank-mix options.
Resistance Management:
x Refer to Section 3.1.
Precautions:
x All cultivars have not been tested for tolerance, especially postemergence or postemergence
chemigation applications. Experiment on a limited basis until on-farm confidence in these use
patterns and rates are obtained.
x On English peas, spring preemergence or pre-plant applications where soils are cold and wet during
pea germination and emergence, the use of Dual Magnum Herbicide may delay maturity and/or
reduce yields.
x Dual Magnum Herbicide will not control emerged weeds. Control emerged weeds with an appropriate
registered postemergence herbicide(s) or by mechanical means.
x The risk of crop injury is greater on lighter textured soils and with higher use rates, especially when
coupled with heavy rains or when excessive multiple irrigations occur within 5 days of application.
x Postemergence or postemergence-chemigation applications to wet plants or when conditions are
extremely hot or humid may result in increased risk of crop injury.
x Postemergence or postemergence-chemigation applications should only be applied in a water- carrier.
The addition of fertilizers, adjuvants or other postemergence herbicides will increase the risk of crop
injury.
USE RESTRICTIONS
1) Refer to Section 7.1 for additional product use restrictions.
2) Refer to Section 4.6 for chemigation restrictions and directions.
3) Maximum Single Application Rate: 2.0 pt/A - (1.91 lb ai/A of S-metolachlor)
4) Minimum Application Interval: 2 weeks
5) Maximum Annual Rate: 2.0 pt/A/year - (1.91 lb ai/A of S-metolachlor)
a. DO NOT exceed 1.91 lb ai/A/year of S-metolachlor-containing products.
6) The combined total amount of Dual Magnum Herbicide from fall, preplant incorporated,
preemergence, postemergence or chemigation applications must not exceed the maximum allowed
annual rate.
7) DO NOT apply to frozen ground.
8) DO NOT make “Fall Applications for Spring Weed Control” or “Postemergence and or Chemigation”
applications to English peas.
9) DO NOT graze or harvest forage or hay following postemergence applications.
10) Preharvest Interval (PHI):
a. Preemergence
i. Forage: 60 days
ii. Hay: 120 days
b. Postemergence Preharvest Interval (PHI):
i. DO NOT GRAZE OR HARVEST FORAGE OR HAY.
ii. Seed: 50 days

Dual Magnum Herbicide
39

9.5.2 Tank-Mix Combinations for Legume Vegetables
Application Tank-Mix Brands Use Directions
Preplant Incorporated Treflan® For use with Dry Beans (Kidney, Navy, Pinto, etc.;
Lima; and Snap).

Apply up to 14 days prior to planting. Incorporate
to a uniform 2-inch depth using appropriate
equipment.

Choose the rate specified on the respective labels
for each product used alone, for the specific soil
texture/organic matter classification and weed
species expected.
See Appendix 12.1 for the EPA Registration Number and Active Ingredient(s) in each listed brand.
TANK-MIX USE RESTRICTIONS
1) All use restrictions cited in Section 9.5.1 for Dual Magnum Herbicide solo apply to tank-mixes with Dual
Magnum Herbicide.
2) It is the pesticide user’s responsibility to ensure that all products are registered for the intended use.
Read and follow the applicable restrictions and limitations and directions for use on all product labels
involved in tank mixing. Users must follow the most restrictive directions for use and precautionary
statements of each product in the tank mixture.

9.6 Peanut
9.6.1 Preplant or Preplant Incorporated, Postplant Incorporated,
Preemergence and Postemergenceor Lay-By Application
Crops (including cultivars, varieties, and/or hybrids)
Peanut
Application
Timing
Rate
(pt/A) Use Directions
Preplant or
Preplant
Incorporated
Preplant
Incorporated

Postplant
Incorporated

Use the following rates for
the specific geography:

Southeast:
Apply 1.0 - 1.33 pt/A

NM, OK and TX:
Apply 0.8 - 1.33 pt/A

Within the rate range, use
lower rates on soils
relatively coarse textured
soils and higher rates on
fine textured soils.
For Preplant Incorporated Applicationion:
Apply within 14 days before planting.

Apply to the soil and incorporate into the top 2 inches
of soil before planting using an implement capable of
providing uniform incorporation.

Use preplant incorporated application if furrow
irrigation is used or when a period of dry weather
after application is expected.

If peanuts will be planted on beds, apply and
incorporate after bed formation.

If Dual Magnum is applied at 0.8 to 1.33 pt/A-(prior to
crop emergence), a sequential application of Dual
Magnum-(after crop emergence) maybe applied up to
1.33 pt/A.

If Dual Magnum is applied a rates greater than 1.33
pt/A- (prior to crop emergence), a sequential

Dual Magnum Herbicide
40

application of Dual Magnum-(after crop emergence)
cannot be applied.For Postplant Incorporation:
Apply and shallowly incorporate into the soil after
planting but before peanut germination.

Incorporation depth and incorporating implements must
be kept above the seed, or seed will be damaged.
Preemergence

Lay-By

Use the following rates for
the specific geography:

Southeast:
Apply 1.0 – 2 pt/A - 1.33
pt/A

Apply 1.33 - 2.0 pt/A
preemergence for partial
control of Florida
beggarweed.

NM, OK and TX:
Apply 0.8 - 1.33 pt/A

Within the rate range, use
lower rates on coarse
textured soils and higher
rates on fine textured
soils.Within the rate range,
use lower rates on soils
relatively coarse textured
and higher rates on fine
textured soils.
Preemergence Application:
Apply after planting but before crop emergence.

If applying at planting, apply behind the planter.

If Dual Magnum is applied at 0.8 to 1.33 pt/A-(prior to
crop emergence), a sequential application of Dual
Magnum-(after crop emergence) maybe applied up to
1.33 pt/A.

If Dual Magnum is applied a rates greater than 1.33
pt/A-(prior to crop emergence), a sequential application
of Dual Magnum-(after crop emergence) cannot be
applied. Lay-By Application:
Apply to the soil immediately after the last cultivation.
Postemergence

Use the following rates for
the specific geography:

Southeast:
Apply 1.0 - 1.33 pt/A

NM, OK and TX:
Apply 0.8 - 1.33 pt/A

Within the rate range, use
lower rates on coarse
textured soils and higher
rates on fine textured
soils.
Postemergence:
If emerged weeds are present, tank-mix Dual Magnum
with an appropriate herbicide to control emerged
weeds.
For Weed Control:
x Refer to Section 8.0 for list of weeds controlled or partially controlled.
Tank Mix Options:
x Refer to Section 9.6.2 for tank mix application options.
Resistance Management:
x Refer to Section 3.1.
Precaution:
x Dual Magnum Herbicide will not control emerged weeds. Control emerged weeds with an appropriate
registered foliar herbicide or by mechanical means.
USE RESTRICTIONS
1) Refer to Section 7.1 for additional product use restrictions.

Dual Magnum Herbicide
41

2) Maximum Application Rate-(prior to crop emergence): 2.0 pt/A - (1.91 lb ai/A of S-metolachlor)
3) Maximum Application Rate-(after crop emergence): 1.33 pt/A – (1.27 lb ai/A of S-metolachlor)
2)4) If Dual Magnum is applied a rates greater than 1.33 pt/A-(prior to crop emergence), a sequential
application of Dual Magnum-(after crop emergence) cannot be applied. Maximum Single Application
Rate: 2.0 pt/A - (1.91 lb ai/A of S-metolachlor)
3)5) Minimum Application Interval: Not Applicable
4)6) Maximum Annual Rate: 2.80 pt/A/year - (2.671.91 lb ai/A of S-metolachlor)
a. DO NOT exceed 2.67 lb ai/A/year of S-metolachlor-containing products.
5)7) DO NOT graze or feed peanut forage or fodder to livestock for 30 days following application.
6)8) Preharvest Interval (PHI): 90 days

Dual Magnum Herbicide
42

9.6.2 Tank-Mix Combinations for Peanut
Application
Timing Tank-Mix Brands Use Directions
Preplant or
Preplant
Incorporated
Prowl® or Prowl® H2O
Pursuit®
Sonalan®
Apply the tank mixture within 14 days before planting.

Apply to the soil and incorporate into the top 2 inches
of soil before planting using an implement capable of
providing uniform incorporation.

Use preplant incorporated application if furrow
irrigation is used or when a period of dry weather after
application is expected.

If peanuts will be planted on beds, apply and
incorporate after bed formation.
Preemergence Prowl® or Prowl® H2O
Pursuit
Strongarm®
Valor® EZ or Valor® SX
Brake®
Apply after planting but prior to crop emergencebefore
peanut cracking.
Ground Cracking

Basagran®
Butyrac® 200
Gramoxone Brands
Pursuit

Apply tank mixtures at ground cracking.

Apply Gramoxone brands as a tank mixture with
Dual Magnum Herbicide at ground cracking to control
or suppress small (1-6 inch) emerged annual grass
and broadleaf weeds and provide residual control of
weeds listed in Section 8.0. Apply in a minimum
spray volume of 20 gal/A with ground equipment.
Ground Cracking
to Postemergence

Gramoxone Brands
Basagran
2,4-DB
Pursuit
Storm®
Cadre®
Apply Gramoxone brands as a tank mixture with
Dual Magnum Herbicide from ground crack to
postemergence to control or suppress small (1-6 inch)
emerged annual grass and broadleaf weeds and
provide residual control of weeds listed in Section 8.0.
Apply in a minimum spray volume of 20 gal/A with
ground equipment.
Apply Basagran as a tank mixture with Dual Magnum
Herbicide from ground cracking to postemergence.
Apply 2,4-DB as a tank mixture with Dual Magnum
Herbicide from ground cracking to postemergence.
Apply Pursuit as a tank mixture with Dual Magnum
Herbicide from ground cracking to postemergence.

Apply Storm as a tank mixture with Dual Magnum
Herbicide at ground cracking to
postemergence.postemergence (after peanut
emergence) through 2 expanded trifoliate leaves.

Dual Magnum Herbicide
43

Apply Pursuit as a tank mixture with Dual Magnum
Herbicide at ground cracking and after peanut
emergence.Apply Cadre as a tank mixture with Dual
Magnum Herbicide early postemergence.
See Appendix 12.1 for the EPA Registration Number and Active Ingredient(s) in each listed brand.
TANK-MIX USE RESTRICTIONS
1) All use restrictions cited in Section 9.6.1 for Dual Magnum Herbicide solo apply to tank-mixes with
Dual Magnum Herbicide.
2) It is the pesticide user’s responsibility to ensure that all products are registered for the intended use.
Read and follow the applicable restrictions and limitations and directions for use on all product labels
involved in tank mixing. Users must follow the most restrictive directions for use and precautionary
statements of each product in the tank mixture.
3) DO NOT apply more than the equivalent of 2.67 lb ai/A/year of Dual Magnum Herbicide.
9.7 Potato
9.7.1 Incorporated, Preemergence, and Postemergence and Lay-By
Application
Crops (including cultivars, varieties, and/or hybrids)
Potato
Application
Timing
Rate
(pt/A) Use Directions
Incorporated 1.0-2.0 pt/A

Within the rate range, use
the lower rate on soils
relatively coarse textured
or low in organic matter;
use the higher rate on
soils relatively fine
textured or high in organic
matter.
Preplant Incorporated
Apply and incorporate into the top 3 inches before
planting using an implement capable of providing
uniform incorporation.
During planting and cultural practices later in the
growing season, avoid bringing untreated soil to the
surface or weed control will be reduced where
untreated soil has been exposed.
Postplant Incorporated
Applications may be made any time after planting to
drag-off, but before potato emergence. Use an
implement that evenly distributes Dual Magnum
Herbicide in the top 2 inches of soil. Do not damage
potato seed pieces or sprouts with incorporation
equipment.
Preemergence 1.0-2.0 pt/A

Within the rate range, use
the lower rate on soils
relatively coarse textured
or low in organic matter;
use the higher rate on
soils relatively fine
textured or high in organic
matter.

For extended residual or
control of heavy weed
infestations, up to 2.6 pt/A
is allowed.
Apply either after planting as a preemergence, delayed
preemergence, after drag-off or hilling treatment.

Effectiveness will be reduced if later cultural practices
expose untreated soil.

Dual Magnum Herbicide
44

Postemergence
After-Hilling/
Lay-By
1.67 pt/A Apply to potatoes after hilling or at lay-by for control of
Dual Magnum Herbicide labeled weeds for remainder
of the growing season.
For Weed Control:
x Refer to Section 8.0 for list of weeds controlled or partially controlled.
Tank Mix Options:
x Refer to Section 9.7.2 for tank mix application options.
Resistance Management:
x Refer to Section 3.1.
Precautions:
x If cool, wet soil conditions occur after application, Dual Magnum Herbicide may delay maturity and/or
reduce yield of Superior and other early maturing potato varieties.
x Dual Magnum Herbicide will not control emerged weeds. Control emerged weeds with an appropriate
registered foliar herbicide or by mechanical means.
USE RESTRICTIONS
1) Refer to Section 7.1 for additional product use restrictions.
2) Maximum Single Application Rate: 2.6 pt/A - (2.48 lb ai/A of S-metolachlor)
3) Maximum Application Interval: Not Applicable
4) Maximum Annual Rate: 3.6 pt/A/year - (3.43 lb ai/A of S-metolachlor)
a. DO NOT exceed 3.43 lb ai/A/year of S-metolachlor-containing products.
5) DO NOT use on muck or peat soils.
6) DO NOT apply both as a preemergence and an incorporated treatment.
7) DO NOT apply to sweet potatoes or yams.
8) Preharvest Interval (PHI):
a. 40 days after a lay-by application
b. 60 days after at-planting to drag-off application


9.7.2 Tank-Mix Combinations for Potato
Application Tank-Mix Brands Use Directions
Preemergence
(East of the Rocky
Mountains)
Linex®
Lorox®
Apply this tank mix mixture preemergence broadcast
application.
Apply to the soil surface after planting and before
emergence of the crop or after final drag-off.
Preemergence
Incorporated

Preemergence

Early
Postemergence
Prowl

For preemergence incorporated use, apply this tank
mixture after planting but before potato emerges.
Keep incorporation depth above the seed pieces and
elongated sprouts, or the crop will be damaged.
For preemergence use, apply this tank mixture after
planting but before potato emerges.
For early postemergence use, apply this tank
mixture after potato emerges.
Preemergence
Postemergence
TriCor® Apply this tank mixture preemergence or
postemergence to potatoes.
For postemergence use, apply this tank mixture as a
directed or semi-directed spray to avoid chlorosis,
minor necrosis, or leaf distortion.
See Appendix 12.1 for the EPA Registration Number and Active Ingredient(s) in each listed brand.

Dual Magnum Herbicide
45

Precaution:
x These use directions do not apply to sweet potatoes or yams.
TANK-MIX USE RESTRICTIONS
1) All use restrictions cited in Section 9.7.1 for Dual Magnum Herbicide solo apply to tank-mixes with
Dual Magnum Herbicide.
2) It is the pesticide user’s responsibility to ensure that all products are registered for the intended use.
Read and follow the applicable restrictions and limitations and directions for use on all product labels
involved in tank mixing. Users must follow the most restrictive directions for use and precautionary
statements of each product in the tank mixture.


9.8 Pumpkin
Crops (including cultivars, varieties, and/or hybrids)
Pumpkin
Application
Timing
Rate
(pt/A) Use Directions
Preemergence
(Inter-Row or
Inter-Hill)
1.0 - 1.33 pt/A

Use the lower rate on soils
light in texture (loamy sand
or lighter) and low in soil
organic matter (less than
3%).
Apply as an inter-row or inter-hill application. Leave
1 foot of untreated area over the row, or 6 inches to
each side of the planted hill and/or any emerged
pumpkin foliage (inter-row or inter-hill means not
directly over the planted seed or young pumpkin
plants).
For Weed Control:
x Refer to Section 8.0 for list of weeds controlled or partially controlled.
Resistance Management:
x Refer to Section 3.1.
Precautions:
x Dual Magnum Herbicide applied as a broadcast spray over the planted row or hill, or applications
made directly to crop foliage will increase the risk of injury to the pumpkin crop such as stand loss,
delayed maturity, and loss of yield.
x Dual Magnum Herbicide will not control emerged weeds. Control emerged weeds with an appropriate
registered foliar herbicide or by mechanical means.
USE RESTRICTIONS
1) Refer to Section 7.1 for additional product use restrictions.
2) Maximum Single Application Rate: 1.33 pt/A - (1.27 lb ai/A of S-metolachlor)
3) Minimum Application Interval: Not Applicable
4) Maximum Annual Rate: 1.33 pt/A/year - (1.27 lb ai/A of S-metolachlor)
a. DO NOT exceed 1.27 lb ai/A/year of S-metolachlor-containing products.
5) Preharvest Interval (PHI): 30 days

9.9 Rhubarb
Crops (including cultivars, varieties, and/or hybrids)
Rhubarb
Application
Timing
Rate
(pt/A) Use Directions

Dual Magnum Herbicide
46

Preemergence 0.67 – 1.33 pt/A

Use lower rates on soils
relatively coarse textured
and higher rates on fine
textured soils.

Apply as a broadcast spray to the soil surface.

Apply in early spring, prior to crop emergence.
For Weed Control:
x Refer to Section 8.0 for list of weeds controlled or partially controlled.
Resistance Management:
x Refer to Section 3.1.
Precaution:
x Dual Magnum Herbicide will not control emerged weeds. Control emerged weeds with an appropriate
registered foliar herbicide or by mechanical means.
USE RESTRICTIONS
1) Refer to Section 7.1 for additional product use restrictions.
2) Maximum Single Application Rate: 1.33 pt/A - (1.27 lb ai/A of S-metolachlor)
3) Minimum Application Interval: Not Applicable
4) Maximum Annual Rate: 1.33 pt/A/year - (1.27 lb ai/A of S-metolachlor)
a. DO NOT exceed 1.27 lb ai/A/year of S-metolachlor-containing products.
5) DO NOT make more than one application of Dual Magnum Herbicide per crop.
6) Preharvest Interval (PHI): 62 days

9.10 Safflowers
Crops (including cultivars, varieties, and/or hybrids)
Safflowers
Application
Timing
Rate
(pt/A) Use Directions
Preplant
Incorporated

For all applications use the
rate for the specific soil
texture and organic matter
(OM) as follows:

Coarse Soils:
1.0-1.33 pt/A; <3% OM
1.33 pt/A; > 3% OM

Medium Soils:
1.33-1.67 pt/A

Fine Soils:
1.33-1.67 pt/A; <3% OM
1.67-2.0 pt/A; > 3% OM
Apply within 14 days of planting.

Apply to the soil and incorporate into the top 2 inches
of soil using an implement capable of providing
uniform incorporation.

Use a preplant incorporated application if furrow
irrigation is used or when a period of dry weather after
application is expected.

If crop will be planted on beds, apply and incorporate
after bed formation, unless specified otherwise.

For California Only:
Broadcast alone or with tank mix partners to the soil
and thoroughly incorporate with a disk or similar
implement set to till 4-6 inches deep. For more
thorough incorporation, till the soil in 2 different
directions (cross-till). Safflowers may be planted on
flat surface or on beds.

Use caution when forming the beds to ensure that
only soil from the treated zone is used (i.e., do not
bring untreated soil to soil surface).

Dual Magnum Herbicide
47

If application is made to preformed beds, incorporate
with a tillage implement set to till 2-4 inches deep.
Use care during tilling to keep the treated, tilled soil on
the beds.
Preemergence For all applications use the
rate for the specific soil
texture and organic matter
(OM) as follows:

Coarse Soils:
1.0-1.33 pt/A; <3% OM
1.33 pt/A; > 3% OM

Medium Soils:
1.33-1.67 pt/A

Fine Soils:
1.33-1.67 pt/A; <3% OM
1.67-2.0 pt/A; > 3% OM
Apply during planting (behind the planter) or after
planting.

For California Only:
Apply after planting. Water with sprinkler or flood
irrigation within 7-10 days.
For Weed Control:
x Refer to Section 8.0 for list of weeds controlled or partially controlled.
Resistance Management:
x Refer to Section 3.1.
Precaution:
x Dual Magnum Herbicide will not control emerged weeds. Control emerged weeds with an appropriate
registered foliar herbicide or by mechanical means.
USE RESTRICTIONS
1) Refer to Section 7.1 for additional product use restrictions.
2) Maximum Single Application Rate: 2.0 pt/A - (1.91 lb ai/A of S-metolachlor)
3) Minimum Application Interval: Not Applicable
4) Maximum Annual Rate: 2.0 pt/A/year - (1.91 lb ai/A of S-metolachlor)
a. DO NOT exceed 1.91 lb ai/A/year of S-metolachlor-containing products.
5) Preharvest Interval (PHI): Not Applicable

9.11 Sorghum (Concep III Treated Only)
9.11.1 Grain or Forage Sorghum, Fall, Preplant Surface, Preplant
Incorporated, Preemergence or Postemergence Applications
Crops (including cultivars, varieties, and/or hybrids of these)
Sorghum grain (seed treated with Concep® III
only) Forage sorghum (seed treated with Concep III only)
Application
Timing
Rate
(pt/A) Use Directions
Fall Application
for Residual
Control of
Glyphosate
Resistant Italian
Ryegrass
1.33-1.67 pt/A

Use the lower rate for coarse
textured soils and the higher
rate for fine textured soils.
Apply from September 1 to December 1 after
harvest of the previous crop and prior to Italian
ryegrass emergence.

If tillage follows application, avoid incorporating to
a depth greater than 2-3 inches.

After emergence of glyphosate resistant Italian
ryegrass, a paraquat brand herbicide can be tank-

Dual Magnum Herbicide
48

mixed with Dual Magnum Herbicide to control
emerged ryegrass.
Preplant Surface
Application in CO,
IA, IL, KS, MO, NE
and SD

Apply the rate for the specific
soil texture as follows:

Coarse Soils: 1.33 pt/A

Medium Soils: 1.5 pt/A

Fine Soils: 1.67 pt/A
Apply up to 45 days before planting.

On coarse soils apply no more than 2 weeks prior
to planting.

Under dry conditions, irrigate after application to
activate Dual Magnum Herbicide and improve
weed control.
Preplant
Incorporated

Preemergence

Apply the rate for the specific
soil texture as follows:

Coarse Soils: 1.0 - 1.33 pt/A

Medium Soils: 1.33 - 1.5 pt/A

Fine Soils: 1.33 -1.67 pt/A
Preplant Incorporated Application:
Apply within 14 days of planting.

Apply to the soil and incorporate into the top 2
inches of soil using an implement capable of
providing uniform incorporation.

Use a preplant incorporated application if furrow
irrigation is used or when a period of dry weather
after application is expected.

Preemergence Application:
Apply after planting but before crop emerges.

Postemergence

Apply the rate for the specific
soil texture as follows:

Coarse Soils: 1.0 - 1.33 pt/A

Medium Soils: 1.33 - 1.5 pt/A

Fine Soils: 1.33 -1.67 pt/A

Apply as a broadcast spray.

When applied alone, Dual Magnum Herbicide will
be safe to emerged sorghum.

The risk of sorghum injury increases when
adjuvants (e.g., non-ionic, crop oil), nitrogen
sources (e.g., AMS, UAN) or fertilizers are applied
with Dual Magnum Herbicide.
For Weed Control:
x Refer to Section 8.0 for list of weeds controlled or partially controlled.
Tank Mix Application Options:
x Refer to Section 9.11.2 for tank-mix options.
Resistance Management:
x Refer to Section 3.1.
Precautions:
x If sorghum seed is not properly treated with Concep III seed treatment, applications prior to sorghum
emergence will result in severe injury or crop death.
x Under high soil moisture conditions prior to sorghum emergence, injury may occur following preplant
and preemergence application. The crop will normally outgrow this effect.
x Avoid use of Dual Magnum Herbicide on sorghum grown under dry mulch tillage, or injury may occur.
x Dual Magnum Herbicide will not control emerged weeds. Control emerged weeds with an appropriate
registered foliar herbicide or by mechanical means.
USE RESTRICTIONS

Dual Magnum Herbicide
49

1) Refer to Section 7.1 for additional product use restrictions.
2) Maximum Single Application Rate: 1.67 pt/A - (1.59 lb ai/A of S-metolachlor)
3) Minimum Application Interval: Not Applicable
4) Maximum Annual Rate: 1.67 pt/A/year - (1.59 lb ai/A of S-metolachlor)
a. DO NOT exceed 1.68 lb ai/A/year of S-metolachlor-containing products.
5) If a spring application is made following a fall application, the total rate of the fall plus spring
applications must not exceed the maximum total rate allowed for S-metolachlor.
6) More than 1 application per year is allowed but the total must not exceed 1.67 pt/A/year.
7) DO NOT apply to frozen ground.
8) Preharvest Interval (PHI): 75 days


9.11.2 Tank-Mix Combinations for Sorghum (Concep III Treated Only)
Application Tank-Mix Brands Use Directions
Burndown Weed
Control
Gramoxone brands
Landmaster® BW
Solo glyphosate brands

For use where sorghum (seed treated with Concep III)
is planted directly into a cover crop, stale seedbed,
established sod, or previous crop residues.

Apply before, during or after planting, but before
sorghum emerges.

The herbicides identified as tank-mix partners may be
tank mixed with Dual Magnum Herbicide or Dual
Magnum Herbicide + AAtrex.
Preplant Surface

Preplant
Incorporated

Preemergence
AAtrex Tank mixtures with AAtrex may be applied in water or
fluid fertilizer.
See Appendix 12.1 for the EPA Registration Number and Active Ingredient(s) in each listed brand.
Precautions:
x If sorghum seed is not properly treated with Concep III seed treatment, applications prior to sorghum
emergence will result in crop death.
x Applications of Dual Magnum Herbicide + AAtrex on highly alkaline soils or on eroded areas where
calcareous subsoils are exposed may cause sorghum injury.
x Burndown, preplant or preemergence applications of Dual Magnum Herbicide to sorghum not treated
with Concep III seed treatment will result in severe injury or kill the crop.
x Under high soil moisture conditions prior to sorghum emergence, injury may occur following the use of
preplant and preemergence applications of Dual Magnum Herbicide + AAtrex. The crop will normally
outgrow this effect.
x Avoid use of Dual Magnum Herbicide + AAtrex on sorghum grown under dry mulch tillage, or injury
may occur.
TANK-MIX USE RESTRICTIONS
1) All use restrictions cited in Section 9.11.1 for Dual Magnum Herbicide solo apply to tank-mixes with
Dual Magnum Herbicide.
2) It is the pesticide user’s responsibility to ensure that all products are registered for the intended use.
Read and follow the applicable restrictions and limitations and directions for use on all product labels
involved in tank mixing. Users must follow the most restrictive directions for use and precautionary
statements of each product in the tank mixture.
3) IMPORTANT: FOR TANK MIXTURES WITH AATREX (OR OTHER BRANDS OF ATRAZINE)
a. If applying Dual Magnum Herbicide in tank mixture with AAtrex, all the restrictions and rate
limitations on the AAtrex label must be followed.

Dual Magnum Herbicide
50

b. DO NOT apply Dual Magnum Herbicide + AAtrex tank mixture on coarse soils or medium soils
with less than 1.5% organic matter.
c. DO NOT apply Dual Magnum Herbicide + AAtrex tank mixture as a preplant incorporated or
preemergence treatment in NM, OK, or TX, except in northeast OK and the TX Gulf Coast and
Blacklands areas.
d. DO NOT apply Dual Magnum Herbicide + AAtrex tank mixture as a preplant incorporated
treatment in AZ or the Imperial Valley of CA.

9.12 Sorghum, Sweet (Concep III Treated Only)
Crops (including cultivars, varieties, and/or hybrids of these)
Sweet sorghum (seed treated with Concep III only)
Application
Timing
Rate
(pt/A) Use Directions
Preplant Surface
Application
Apply the rate for the
specific soil texture as
follows:

Coarse Soils: 1.33 pt/A

Medium Soils: 1.5 pt/A

Fine Soils: 1.67 pt/A
On medium- and fine soils, apply up to 30 days before
planting.

On coarse soils apply no more than 14 days prior to
planting.

To the extent possible, do not move treated soil out of
the row or move untreated soil to the surface during
planting, or weed control will be diminished.

Under dry conditions, irrigate after application to
activate Dual Magnum Herbicide and improve weed
control.
Preplant
Incorporated

Preemergence
Apply Dual Magnum
Herbicide at the rates below
for the soil texture:

Coarse Soils: 1.0 - 1.33 pt/A

Medium Soils: 1.33-1.5 pt/A

Fine Soils: 1.33-1.67 pt/A
Preplant Incorporated Application:
Make applications within 14 days of planting.

Apply to the soil and incorporate into the top 2 inches
of soil using an implement capable of providing
uniform incorporation.

Use a preplant incorporated application if furrow
irrigation is used or when a period of dry weather
after application is expected.

If crop will be planted on beds, apply and incorporate
after bed formation, unless specified otherwise.

Preemergence Application:
Apply after planting but before crop emerges.

Under dry conditions, irrigate after application to
activate Dual Magnum Herbicide and improve weed
control.
Postemergence

Apply Dual Magnum
Herbicide at the rates below
for the soil texture:

Coarse Soils: 1.0 - 1.33 pt/A

Medium Soils: 1.33 pt/A

Apply up to a crop height of 5 inches.

When applied alone, Dual Magnum Herbicide will be
safe to emerged sweet sorghum. Use of adjuvants is
prohibited on sweet sorghum.

Dual Magnum Herbicide
51

Fine Soils: 1.33 pt/A

For Weed Control:
x Refer to Section 8.0 for list of weeds controlled or partially controlled.
Resistance Management:
x Refer to Section 3.1.
Precautions:
x If sweet sorghum seed is not properly treated with Concep III seed treatment, Dual Magnum Herbicide
applications prior to sorghum emergence will result in crop death.
x Under high soil moisture conditions prior to sweet sorghum emergence, injury may occur following soil
applications. The crop will normally outgrow this effect.
x Avoid use of Dual Magnum Herbicide on sweet sorghum grown under dry mulch tillage, or injury may
occur.
x Weed control will be reduced under dry conditions, irrigate after application to activate the Dual Magnum
Herbicide.
x Dual Magnum Herbicide will not control emerged weeds. Control emerged weeds with an appropriate
registered foliar herbicide or by mechanical means.
USE RESTRICTIONS
1) Refer to Section 7.1 for additional product use restrictions.
2) Maximum Single Application Rate: 1.67 pt/A - (1.59 lb ai/A of S-metolachlor)
3) Minimum Application Interval: Not Applicable
4) Maximum Annual Rate: 1.67 pt/A/year - (1.59 lb ai/A of S-metolachlor)
a. DO NOT exceed 1.59 lb ai/A/year of S-metolachlor-containing products.
5) DO NOT make more than 1 application per year.
6) Preharvest Interval (PHI): 90 days

9.13 Soybeans [(NOT FOR POSTEMERGENCE USE IN CALIFORNIA)]
9.13.1 Fall, Preplant Surface, Preplant Incorporated, Preemergence or
Postemergence Applications
Crops (including cultivars, varieties, and/or hybrids of these)
Soybeans
Application
Timing
Rate
(pt/A) Use Directions
Fall Application
for Spring Weed
Control

For use in the
following states:
Iowa
Illinois
Minnesota
Nebraska
North Dakota
South Dakota
Wisconsin
For minimum-till or no-
tillage systems on soils
with > 2.5% organic
matter, apply rate based
on soil texture:

Medium Soils:
Apply 1.67-2.0 pt/A

Fine Soils:
Apply 2.0 pt/A
Apply after harvest when the sustained soil
temperature at a 4-inch depth is less than 55° F and
falling.

Apply to ground that will be planted to soybeans the
next spring and time application according to the
following geographic schedule:

Apply after September 30 in ND, SD, MN, WI and
north of Route 30 in IA.

Apply after October 15 North of Route 91 in NE and
south of Route 30 in IA.

Dual Magnum Herbicide
52

Apply after October 31 North of Route 136 in IL.

When fall and/or a spring tillage follows application,
avoid incorporating to a depth greater than 2-3 inches.

Minimize furrow and ridge formation in the tillage
operations.
Fall Application
for Residual
Control of
Glyphosate
Resistant Italian
Ryegrass
1.33 – 1.67 pt/A

Use the lower rate for
coarse textured soils and
the higher rate for fine
textured soils.
Apply from September 1 – December 1 after harvest
of the previous crop and prior to Italian ryegrass
emergence.

If tillage follows application, avoid incorporating to a
depth greater than 2-3 inches.

After emergence of glyphosate resistant Italian
ryegrass, a Gramoxone brand herbicide can be tank-
mixed with Dual Magnum Herbicide to control
emerged ryegrass.
Preplant Surface
Application
Apply Dual Magnum
Herbicide at rates below
for the soil texture:

Coarse Soils: 1.33 pt/A
Medium Soils: 1.67 pt/A
Fine Soils: 2.0 pt/A

For extended residual or
control of heavy weed
infestations, up to 2.6 pt/A
is allowed.
Apply up to 14 days prior to planting on coarse soils.

Apply up to 30 days before planting on medium or fine
soils.
Preplant
Incorporated


Preemergence

For all applications use the
rate for the specific soil
texture and organic matter
(OM) as follows:

Coarse Soils:
1.0-1.33 pt/A; <3% OM
1.33 pt/A; > 3% OM

Medium Soils:
1.33-1.67 pt/A

Fine Soils:
1.33-1.67 pt/A; <3% OM
1.67-2.0 pt/A; > 3% OM

For extended residual or
control of heavy weed
infestations, up to 2.6 pt/A
is allowed.
Preplant Incorporation Application:
Apply within 14 days of planting.

Apply to the soil and incorporate into the top 2
inches of soil using an implement capable of
providing uniform incorporation.

Use a preplant incorporated application if furrow
irrigation is used or when a period of dry weather
after application is expected.

If crop will be planted on beds, apply and
incorporate after bed formation, unless specified
otherwise.

Preemergence Application:
Apply during planting or after planting but before
crop emerges.
Postemergence 1.0 – 2.0 pt/A

Use the lower rate for
coarse textured soils and
the higher rate for fine
textured soils.
Apply to extend the duration of weed control in
soybean.

Dual Magnum Herbicide
53


For Weed Control:
x Refer to Section 8.0 for list of weeds controlled or partially controlled.
Tank Mix Application Options:
x Refer to Section 9.13.2 for tank-mix options.
Resistance Management:
x Refer to Section 3.1.
Precautions:
x For preplant surface application, to the extent possible, avoid moving treated soil out of the row or
moving untreated soil to the surface during planting or weed control will be diminished.
x Dual Magnum Herbicide will not control emerged weeds. Control emerged weeds with an appropriate
registered foliar herbicide or by mechanical means.
USE RESTRICTIONS
1) Refer to Section 7.1 for additional product use restrictions.
2) Maximum Single Application Rate:
a. DO NOT apply more than 2.6 pt/A in a single preemergence application - (2.48 lb ai/A of S-
metolachlor).
b. DO NOT apply more than 2.0 pt/A in a single postemergence application - (1.91 lb ai/A of S-
metolachlor).
3) Minimum Application Interval: Not Applicable
4) Maximum Annual Rate: 3.9 pt/A/year - (3.71 lb ai/A of S-metolachlor)
a. DO NOT exceed 3.71 lb ai/A/year of S-metolachlor-containing products.
5) The combined total amount of Dual Magnum Herbicide from all applications in the fall plus spring
must not exceed the maximum allowed annual rate.
6) More than one postemergence application may be applied, but the total applied to the crop must not
exceed 3.9 pt/A/year.
7) DO NOT apply Dual Magnum Herbicide to frozen ground.
8) DO NOT graze or feed treated forage, hay or straw from soybeans to livestock for 30 days following a
preplant surface, preplant incorporated or preemergence application.
9) DO NOT graze or feed treated forage or hay from soybeans to livestock following a postemergence
application.
10) Preharvest Interval (PHI): 75 days

9.13.2 Tank-Mix Combinations for Soybeans
Application Tank-Mix Brands Use Directions
Preplant Surface
Preemergence
Gramoxone brands
Solo glyphosate brands
Use these tank mixtures for burndown plus residual
control in reduced or no-till systems.
Authority® MTZ
TriCor
Canopy®
Authority® First
Authority® Maxx
Classic®
FirstRate®
Sharpen®
Sonic®
Verdict®
Use these tank mixtures for additional residual control.

Do not use this Authority MTZ of Tricor tank mixes on
soil with less than 0.5% organic matter or on alkaline
soils with a pH over 7.4.

If heavy rain occurs soon after application, crop injury
may result.

Use of Authority MTZ of Tricor is not recommended for
soybean varieties known to be metribuzin sensitive.

Dual Magnum Herbicide
54

Postemergence


Classic
FirstRate
Flexstar®
Fusilade® DX
Fusion®
Prefix®
Python®
Reflex®
Use these tank mixtures for control of emerged weeds
plus residual control of grasses and small-seeded
broadleaf weeds.

Follow the tank-mix partner label for adjuvant use
instructions.
Postemergence to
Glyphosate
Resistant
Soybeans

Flexstar® GT
Solo glyphosate brands
Use these tank mixtures only on glyphosate resistant
soybeans.

Use of Dual Magnum Herbicide in these tank mixtures
will provide residual control of weeds listed in Section
8.0.

Follow the tank-mix partner label for adjuvant use
instructions.
Apply only to soybeans that are resistant to
glyphosate.

Postemergence to
Glufosinate
Resistant
Soybeans

Liberty Use this tank mixture only on soybeans that are
resistant to glufosinate (e.g., LibertyLink®).

Use of Dual Magnum Herbicide in this tank mixture will
provide residual control of weeds listed in Section 8.0.

Follow the Liberty product label for adjuvant use
instructions.

Apply only to soybeans that are resistant to
glufosinate.

See Appendix 12.1 for the EPA Registration Number and Active Ingredient(s) in each listed brand.
Precaution:
x The use of COC or UAN with Dual Magnum Herbicide may result in temporary crop injury with
postemergence applications.
TANK-MIX USE RESTRICTIONS
1) All use restrictions cited in Section 9.13.1 for Dual Magnum Herbicide solo apply to tank mixes with
Dual Magnum Herbicide.
2) It is the pesticide user’s responsibility to ensure that all products are registered for the intended use.
Read and follow the applicable restrictions and limitations and directions for use on all product labels
involved in tank mixing. Users must follow the most restrictive directions for use and precautionary
statements of each product in the tank mixture.

9.14 Sugar Beets
9.14.1 Postemergence Application
Crops (including cultivars, varieties, and/or hybrids of these)
Sugar Beets
Application
Timing
Rate
(pt/A) Use Directions

Dual Magnum Herbicide
55

Postemergence

Apply Dual Magnum
Herbicide at rates below
for the soil texture:

Coarse Soils: 1.0 pt/A
Medium Soils: 1.33 pt/A
Fine Soils: 1.67 pt/A
Apply after sugar beets have reached first true leaf
stage.

More than one postemergence application may be
made.
For Weed Control:
x Refer to Section 8.0 for list of weeds controlled or partially controlled.
Tank Mix Application Options:
x Refer to Section 9.14.2 for tank-mix options.
Resistance Management:
x Refer to Section 3.1.
Precaution:
x Dual Magnum Herbicide will not control emerged weeds. Control emerged weeds with an appropriate
registered foliar herbicide or by mechanical means.
USE RESTRICTIONS
1) Refer to Section 7.1 for additional product use restrictions.
2) Maximum Single Application Rate: 1.67 pt/A - (1.59 lb ai/A of S-metolachlor)
3) Minimum Application Interval: Not Applicable
4) Maximum Annual Rate: 2.67 pt/A/year - (2.54 lb ai/A of S-metolachlor)
a. DO NOT exceed 2.54 lb ai/A/year of S-metolachlor-containing products.
5) More than one postemergence application may be applied, but the total must not exceed 2.67 pt/A.
6) Preharvest Interval (PHI): 60 days

9.14.2 Tank-Mix Combinations for Sugar Beets
Application Tank-Mix Brands Use Directions
Postemergence Assure® II
Poast®
Select®
Stinger®
Upbeet®
Tank mixtures of these products will increase the risk
of crop injury over that of either product applied alone.


See Appendix 12.1 for the EPA Registration Number and Active Ingredient(s) in each listed brand.
Precautions:
x The addition of a spray adjuvant such as crop oil concentrates (COC’s) or methylated seed oils
(MSO’s) can further increase the risk of crop injury.
x Injury risk can be reduced by using the lowest effective rate of the tank mix partner(s) and/or adjuvant
and by avoiding applications under adverse growing conditions or high soil or air humidity.
TANK-MIX USE RESTRICTIONS
1) All use restrictions cited in Section 9.14.1 for Dual Magnum Herbicide solo apply to tank-mixes with
Dual Magnum Herbicide.
2) It is the pesticide user’s responsibility to ensure that all products are registered for the intended use.
Read and follow the applicable restrictions and limitations and directions for use on all product labels
involved in tank mixing. Users must follow the most restrictive directions for use and precautionary
statements of each product in the tank mixture.

Dual Magnum Herbicide
56

9.15 Sugarcane [(NOT FOR USE IN CALIFORNIA)]
9.15.1 Preplant, Preemergence and Postemergence Applications
Crops (including cultivars, varieties, and/or hybrids of these)
Sugarcane
Application
Timing
Rate
(pt/A) Use Directions
Preplant 1.78 – 2.44 pt/A


See Section 4.3 for Application Volume and Spray
coverage information.

Apply by ground or air prior to planting of cane.

Application can also be made after harvest of ratoon
cane.

Apply by ground or air as a broadcast application for
the residual control of certain grasses and broadleaf
weeds, plus yellow nutsedge. Dual Magnum
Herbicide will not control emerged weeds.
Preemergence

1.78 – 2.44 pt/A


See Section 4.3 for Application Volume and Spray
coverage information.

Apply by ground or air after planting of cane but
prior to crop emergence.

Application can also be made after harvest of ratoon
cane.

Apply by ground or air as a broadcast application for
the residual control of certain grasses and broadleaf
weeds, plus yellow nutsedge. Dual Magnum
Herbicide will not control emerged weeds.
Postemergence

1.00 – 1.96 pt/A


See Section 4.3 for Application Volume and Spray
coverage information.

Apply by ground or air as a broadcast application for
the residual control of certain grasses and broadleaf
weeds, plus yellow nutsedge. Dual Magnum
Herbicide will not control emerged weeds.

If a preplant or preemergence application was made
earlier in the season (not to exceed 2.44 pt/A) only
1.0 pt/A maybe applied postemergence. The total
amount of Dual Mangum applied preplant,
preemergence and postemergence cannot exceed
3.49 pt/A/year-(3.34 lb ai/A/year).
For Weed Control:
x Refer to Section 8.0 for list of weeds controlled or partially controlled.
Tank Mix Application Options:
x Refer to Section 9.15.2 for tank-mix options.
Resistance Management:
x Refer to Section 3.1.
USE PRECAUTIONS
x Postemergence application rates less than 1.0 pt/A may result in incomplete weed control and loss of

Dual Magnum Herbicide
57

residual control.
x The addition of a spray adjuvant such as crop oil concentrates (COC’s) or methylated seed oils
(MSO’s) can increase the risk of crop injury.
USE RESTRICTIONS
1) Refer to Section 7.1 for additional product use restrictions.
2) Maximum Single Preplant or Preemergence Application Rate: 2.44 pt/A - (2.32 lb ai/A of S-
metolachlor)
3) Maximum Single Postemergence Application Rate: 1.96 pt/A - (1.87 lb ai/A of S-metolachlor)
4) Maximum Single Postemergence Application Rate, if a Preplant or Preemergence
application was made: 1.0 pt/A - (0.95 lb ai/A of S-metolachlor)
5) DO NOT make more than two applications of Dual Magnum Herbicide.
6) DO NOT make application to sugarcane greater than 60 inches in height.
7) Minimum Application Interval: 2 weeks
8) Maximum Annual Rate: 3.49 pt/A/year- (3.32 lb ai/A of S-metolachlor)
a. DO NOT exceed 3.34 lb ai/A/year of s-metolachlor-containing products.
9) Preharvest Interval (PHI):
a. DO NOT apply within 100 days of harvest


9.15.2 Tank-Mix Combinations for Sugarcane
Application Tank-Mix Brands Use Directions
Preplant Solo glyphosate brands

Gramoxone brands


These tank-mixtures are for the control of emerged
weeds prior to sugarcane emergence.

Do not apply solo glyphosate brands or Gramoxone
brands postemergence over- the-top to emerged
sugarcane

If Dual Magnum Herbicide is tank-mixed with other
herbicides follow the label restrictions for the most
restrictive tank-mix partner(s).
Preemergence AAtrex brands or other solo
atrazine products

Callisto® or Explorer®

Callisto Xtra®

Envoke®

Evik®

Prowl, Prowl® H2O or
other solo pendimethalin
products

TriCor or other solo
metribuzin products
These tank mixtures are for improved weed control
spectrum.

If Dual Magnum Herbicide is tank-mixed with other
herbicides follow the label restrictions for the most
restrictive tank-mix partner(s).

Postemergence AAtrex brands or other solo
atrazine products

Callisto or Explorer
These tank mixtures are for improved spectrum and
improved postemergence weed control.

Dual Magnum Herbicide
58


Callisto Xtra

2,4-D

Armezon® or other solo
tropramezone products

Banvel, Clarity® or other
solo dicamba containing
products

Envoke

Evik

Permit® or other solo
halosulfuron products

TriCor or other solo
metribuzin products
If Dual Magnum Herbicide is tank-mixed with other
herbicides follow the label restrictions for the most
restrictive tank-mix partner(s).

See Appendix 12.1 for the EPA Registration Number and Active Ingredient(s) in each listed brand.
TANK-MIX USE PRECAUTIONS
Precautions:
x The addition of a spray adjuvant such as a crop oil concentrate (COC) or methylated seed oil (MSO)
can increase the risk of crop injury.
x Injury risk can be reduced by using the lowest effective rate of the tank mix partner(s) and/or adjuvant
and by avoiding applications under adverse growing conditions or high soil or air humidity.
x Not all tank-mixes have been tested for crop tolerance. Experiment on a limited basis until on- farm
confidence in these tank-mixes are obtained.
TANK-MIX USE RESTRICTIONS
1) All use restrictions cited in Section 9.15.1 for Dual Magnum Herbicide solo apply to tank mixes with
Dual Magnum Herbicide.
2) It is the pesticide user’s responsibility to ensure that all products are registered for the intended use.
Read and follow the applicable restrictions and limitations and directions for use on all product labels
involved in tank mixing. Users must follow the most restrictive directions for use and precautionary
statements of each product in the tank mixture.

9.16 Sunflowers
Crops (including cultivars, varieties, and/or hybrids of these)
Sunflowers
Application
Timing
Rate
(pt/A) Use Directions
Preplant
Incorporated


Preemergence
For all applications use the
rate for the specific soil
texture and organic matter
(OM) as follows:

Coarse Soils:
1.0-1.33 pt/A; <3% OM
1.33 pt/A; > 3% OM
Preplant Incorporation Application:
Apply within 14 days of planting.

Apply to the soil and incorporate into the top 2
inches of soil using an implement capable of
providing uniform incorporation.

Dual Magnum Herbicide
59


Medium Soils:
1.33-1.67 pt/A

Fine Soils:
1.33-1.67 pt/A; <3% OM
1.67-2.0 pt/A; > 3% OM

Within the rate range, use
the higher rate of Dual
Magnum Herbicide if heavy
weed infestations are
expected.
Use a preplant incorporated application if furrow
irrigation is used or when a period of dry weather
after application is expected.

If crop will be planted on beds, apply and
incorporate after bed formation, unless specified
otherwise.


Preemergence Application:
Apply after planting but before crop emerges.
For Weed Control:
x Refer to Section 8.0 for list of weeds controlled or partially controlled.
Resistance Management:
x Refer to Section 3.1.
Precaution:
x Dual Magnum Herbicide will not control emerged weeds. Control emerged weeds with an appropriate
registered foliar herbicide or by mechanical means.
USE RESTRICTIONS
1) Refer to Section 7.1 for additional product use restrictions.
2) Maximum Single Application Rate: 2.0 pt/A - (1.91 lb ai/A of S-metolachlor)
3) Minimum Application Interval: Not Applicable
4) Maximum Annual Rate: 2.0 pt/A/year - (1.91 lb ai/A of S-metolachlor)
a. DO NOT exceed 1.91 lb ai/A/year of S-metolachlor-containing products.
5) DO NOT exceed the maximum label rates given above for the soil type.
6) DO NOT allow livestock to graze or feed in treated area.
7) Preharvest Interval (PHI): Not Applicable

9.17 Tomato
Crops (including cultivars, varieties, and/or hybrids of these)
Tomato, seeded Tomato, transplanted
Application
Timing
Rate
(pt/A) Use Directions
For Transplanted
Tomatoes

Preplant
Incorporated

Preplant

Post-Directed

For all applications, use
the rate for the specific soil
texture and organic matter
(OM) as follows:

Coarse Soils:
1.0-1.33 pt/A; <3% OM
1.33 pt/A; > 3% OM

Medium Soils:
1.33-1.67 pt/A

Fine Soils:
1.33-1.67 pt/A; <3% OM
1.67-2.0 pt/A; > 3% OM
Preplant Incorporation Application:
Apply to the soil and incorporate into the soil using
an implement capable of providing uniform
incorporation.

Use a preplant incorporated application if furrow
irrigation is used or when a period of dry weather
after application is expected.

Preplant Application:
Apply before transplanting and keep soil disturbance
to a minimum during the transplanting operation.

In bedded transplanted tomatoes, apply Dual
Magnum Herbicide preplant non-incorporated to the
top of the pressed bed, as the last step prior to
laying plastic.

Dual Magnum Herbicide
60

Dual Magnum Herbicide may also be used to treat
row-middles in bedded tomatoes, as long as the
total amount of Dual Magnum Herbicide does not
exceed the maximum allowed per crop.

Post-Directed Application:
Apply after the first settling rain or irrigation.

Apply in a minimum of 20 gallons of water per acre
and minimize contact with tomato plants.
For Seeded
Tomatoes

Post-Directed
For all applications, use
the rate for the specific soil
texture and organic matter
(OM) as follows:

Coarse Soils:
1.0-1.33 pt/A; <3% OM
1.33 pt/A; > 3% OM

Medium Soils:
1.33-1.67 pt/A

Fine Soils:
1.33-1.67 pt/A; <3% OM
1.67-2.0 pt/A; > 3% OM

Apply to when tomato plants are at least 4 inches tall.

Apply in a minimum of 20 gallons of water per acre.

Minimize spray contact with tomato plants.
For Weed Control:
x Refer to Section 8.0 for list of weeds controlled or partially controlled.
Resistance Management:
x Refer to Section 3.1.
Precautions:
x Application to varieties or cultivars with unknown tolerance to Dual Magnum Herbicide may result in
crop injury.
x Dual Magnum Herbicide may damage transplants that have been weakened by any cause. To
prevent damage, plant only healthy transplants and avoid planting when wet, cool, or unfavorable
growing conditions exist.
x In transplanted tomatoes, if Dual Magnum Herbicide is applied preplant incorporated, incorporate to a
depth less than the depth of transplanting, and use the lower end of the rate range for the given soil
type, or damage may occur.
x For row middle applications where tomatoes are grown on sandy soils and where high soil moisture
conditions can exist (e.g., low binding and high evaporation conditions), as may be found in the States
of Florida, Georgia, Maryland, and Virginia, there is potential for crop injury in the form of leaf
epinasty. The risk of this type of injury can be reduced by: a) incorporating the Dual Magnum
Herbicide immediately following application, b) applying the Dual Magnum Herbicide seven or more
days before transplanting (but only after the beds have been formed), c) minimizing the application of
Dual Magnum Herbicide onto the plastic of the bed, or d) any combination of the above.
x Dual Magnum Herbicide will not control emerged weeds. Control emerged weeds with an appropriate
registered foliar herbicide or by mechanical means.
USE RESTRICTIONS
1) Refer to Section 7.1 for additional product use restrictions.
2) Maximum Single Application Rate: 2.0 pt/A - (1.91 lb ai/A of S-metolachlor)
3) Minimum Application Interval: Not Applicable
4) Maximum Annual Rate: 2.0 pt/A/year - (1.91 lb ai/A of S-metolachlor)
a. DO NOT exceed 1.91 lb ai/A/year of S-metolachlor-containing products.
5) Apply only by ground application.
6) When applying at 1.33 pt/A - (1.27 lb ai/A of S-metolachlor) per year with a 30 day PHI:

Dual Magnum Herbicide
61

a. DO NOT exceed two applications per growing season and do not use adjuvants.
7) Preharvest Interval (PHI):
a. 30 days, if the total amount of Dual Magnum Herbicide applied does not exceed 1.33 pt/A/year.
b. 90 days, if the total amount of Dual Magnum Herbicide applied is greater than 1.33 pt/A/year.

10.0 STORAGE AND DISPOSAL

STORAGE AND DISPOSAL
Do not contaminate water, food, or feed, by storage or disposal.

Pesticide Storage

This product may be stored at temperatures down to 30 degrees below 0°F.

Pesticide Disposal

Open dumping is prohibited. Wastes resulting from the use of this product are toxic.
Improper disposal of unused pesticide, spray mixture, or rinsate is a violation of federal law.
Pesticide, spray mixture, or rinsate that cannot be used according to label instructions must
be disposed of according to federal, state, or local procedures. For guidance in proper
disposal methods, contact your State Pesticide or Environmental Control Agency, or the
Hazardous Waste representative at the nearest EPA Regional Office.

Container Handling [(less than or equal to 5 gallons)]
Non-refillable container. Do not reuse or refill this container. Triple rinse container (or
equivalent) promptly after emptying. Triple rinse as follows: Empty the remaining contents
into application equipment or a mix tank and drain for 10 seconds after the flow begins to
drip. Fill the container ¼ full with water and recap. Shake for 10 seconds. Pour rinsate into
application equipment or a mix tank or store rinsate for later use or disposal. Drain for 10
seconds after the flow begins to drip. Repeat this procedure two more times. Then offer for
recycling if available or puncture and dispose of in a sanitary landfill, or by incineration, or by
other procedures approved by state and local authorities.

Container Handling [(greater than 5 gallons)]
Non-refillable container . Do not reuse or refill this container. Triple rinse container (or
equivalent) promptly after emptying. Triple rinse as follows: Empty the remaining contents into
application equipment or a mix tank. Fill the container ¼ full with water. Replace and tighten
closures. Tip container on its side and roll it back and forth, ensuring at least one complete
revolution, for 30 seconds. Stand the container on its end and tip it back and forth several
times. Turn the container over onto its other end and tip it back and forth several times. Empty
the rinsate into application equipment or a mix tank or store rinsate for later use or disposal.
Repeat this procedure two more times. Then offer for recycling if available or puncture and
dispose of in a sanitary landfill, or by incineration, or by other procedures approved by state
and local authorities.

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Container Handling ([greater than 5 gallons)]
Refillable container. Refill this container with pesticide only. Do not reuse this container for
any other purpose. Cleaning the container before final disposal is the responsibility of the
person disposing of the container. Cleaning before refilling is the responsibility of the person
refilling. To clean container before final disposal, empty the remaining contents from this
container into application equipment or mix tank. Fill the container about 10 percent full with
water. Agitate vigorously or recirculate water with the pump for 2 minutes. Pour or pump
rinsate into application equipment or rinsate collection system. Repeat this rinsing procedure
two more times. Then offer for recycling if available or puncture and dispose of in a sanitary
landfill, or by incineration, or by other procedures approved by state and local authorities.

CONTAINER IS NOT SAFE FOR FOOD, FEED, OR DRINKING WATER.

11.0 CONDITIONS OF SALE AND LIMITATION OF WARRANTY
AND LIABILITY
NOTICE: Read the entire Directions for Use and Conditions of Sale and Limitation of
Warranty and Liability before buying or using this product. If the terms are not acceptable,
return the product at once, unopened, and the purchase price will be refunded.

The Directions for Use of this product must be followed carefully. It is impossible to eliminate
all risks inherently associated with the use of this product. Crop injury, ineffectiveness or
other unintended consequences may result because of such factors as manner of use or
application, weather or crop conditions, presence of other materials or other influencing
factors in the use of the product, which are beyond the control of SYNGENTA CROP
PROTECTION, LLC or Seller. To the extent permitted by applicable law, Buyer and User
agree to hold SYNGENTA and Seller harmless for any claims relating to such factors.

SYNGENTA warrants that this product conforms to the chemical description on the label and
is reasonably fit for the purposes stated in the Directions for Use, subject to the inherent risks
referred to above, when used in accordance with directions under normal use conditions. To
the extent permitted by applicable law: (1) this warranty does not extend to the use of the
product contrary to label instructions, or under conditions not reasonably foreseeable to or
beyond the control of Seller or SYNGENTA, and (2) Buyer and User assume the risk of any
such use. TO THE EXTENT PERMITTED BY APPLICABLE LAW, SYNGENTA MAKES NO
WARRANTIES OF MERCHANTABILITY OR OF FITNESS FOR A PARTICULAR PURPOSE
NOR ANY OTHER EXPRESS OR IMPLIED WARRANTY EXCEPT AS WARRANTED BY
THIS LABEL.

To the extent permitted by applicable law, in no event shall SYNGENTA be liable for any
incidental, consequential or special damages resulting from the use or handling of this
product. TO THE EXTENT PERMITTED BY APPLICABLE LAW, THE EXCLUSIVE
REMEDY OF THE USER OR BUYER, AND THE EXCLUSIVE LIABILITY OF SYNGENTA
AND SELLER FOR ANY AND ALL CLAIMS, LOSSES, INJURIES OR DAMAGES
(INCLUDING CLAIMS BASED ON BREACH OF WARRANTY, CONTRACT,
NEGLIGENCE, TORT, STRICT LIABILITY OR OTHERWISE) RESULTING FROM THE
USE OR HANDLING OF THIS PRODUCT, SHALL BE THE RETURN OF THE PURCHASE

Dual Magnum Herbicide
63

PRICE OF THE PRODUCT OR, AT THE ELECTION OF SYNGENTA OR SELLER, THE
REPLACEMENT OF THE PRODUCT.

SYNGENTA and Seller offer this product, and Buyer and User accept it, subject to the
foregoing Conditions of Sale and Limitation of Warranty and Liability, which may not be
modified except by written agreement signed by a duly authorized representative of
SYNGENTA.

12.0 APPENDIX

12.1 Tank-Mix Partner Table

Product Name EPA Registration Number Active Ingredient(s)
2,4-D 1381-102-(multiple) 2,4-D
2,4-DB 200 1381-215-(multiple) 2,4-DB
Cadre 241-364 imazapic
Strongarm 62719-288 diclosulam
Brake 67690-78 fluridone
Valor EZ or Valor SX 59639-221 or 59639-99 flumioxazin
AAtrex 100-497 & 100-585 atrazine
Banvel 55947-38 dicamba
Gramoxone 100-1431 & 100-1652 paraquat
Roundup 524-549-(multiple) Solo glyphosate
Princep 100-526 & 100-603 simazine
Balance Flexx 264-1067 isoxaflutole
Status 7969-242 dicamba + Diflufenzopyr
Liberty 264-829 & 7969-448 glufosinate-Ammonium
Cotoran 66222-181 fluometuron
Caparol 100-620 prometryn
Treflan 34704-853-(multiple) trifluralin
Prowl & Prowl H2O 241-337 & 241-418 pendimethalin
Pursuit 241-310 imazethapyr
Sonalan 10163-355 & 10163-356 ethalfluralin
Basagran 7969-112-(multiple) bentazon

Dual Magnum Herbicide
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Butyrac 42750-39 & 42750-38 2,4-DB
Storm 7050-59 bentazon + acifluorfen
Linex 61842-21 linuron
Lorox 61842-23 linuron
Tricor 70506-68 & 70506-103 metribuzin
Landmaster BW 42750-62 glyphosate + 2,4-D
Authority MTZ 279-3340 metribuzin + sulfentrazone
Canopy 352-444 metribuzin + chlorimuron
Authority First 279-3246 sulfentrazone + choransulam
Classic 352-436 chlorimuron
FirstRate 62719-275 cloransulam
Sharpen 7969-278 saflufenacil
Sonic 62719-680 sulfentrazone + choransulam
Verdict 7969-279 dimethenamid-p + saflufenacil
Flexstar 100-1101 fomesafen
Fusilade DX 100-1070 fluazifop
Fusion 100-1059 fluazifop + fenoxaprop
Prefix 100-1268 S-metolachlor + fomesafen
Python 62719-277 flumetsulam
Reflex 100-933 fomesafen
Flexstar GT 100-1385 fomesafen + glyphosate
Liberty 264-829 & 7969-448 glufosinate
Assure II 352-541 & 5481-646 quizalofop
Select 59639- & 59639-3-1381 clethodim
Poast 7969-58 sethoxydim
Stinger 62719-73 clopyralid
Upbeet 279-9584 triflusulfuron
Callisto Xtra 100-1359 atrazine + mesotrione
Callisto 100-1131 mesotrione
Explorer 100-1131 mesotrione
Envoke 100-1132 trifloxysulfuron-sodium
Evik 100-786 ametryn

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Clarity 7996-137 dicamba
Permit 81880-2-10163 halosulfuron
Armezon 7969-262 topramezone

AAtrex®, Callisto®, Callisto Xtra®, Caparol®, Concep III®, Dual Magnum®, Envoke®, Evik®,
Explorer®, Flexstar®, Flexstar® GT, Fusilade® DX, Fusion®, Gramoxone®, Prefix®,
Princep®, Reflex®, and the ALLANCE Frame and the Syngenta logo are Trademarks of a
Syngenta Group Company

Assure® II is a trademark of Amvac Chemical Corporation

Canopy®, Classic®, FirstRate®, Python®, Sonalan®, Sonic®, and Stinger®, and Strongarm
are trademarks of Corteva Agriscience

Viton™ is a trademark of The Chemours Company FC, LLC

Permit® and Treflan® are trademarks of Gowan Company

Linex® and Lorox® are trademarks of Tessenderlo Kerley, Inc

Agsorb® trademark of Oil-Dri Corporation

Brake® is a registered trademark of SePRO Corporation

Balance Flexx®, and Roundup® are trademarks of Bayer CropScience

Butyrac® and Landmaster® are trademarks of Albaugh, LLC

Armezon®, Banvel®, Cadre, Clarity®, Liberty®, Liberty Link®, Poast®, Prowl®, Prowl® H2O,
Pursuit®, Sharpen®, Status®, and Verdict® are trademarks of BASF Ag Products

Basagran® is a trademark of Winfield United

Storm® Select® and
 TriCor® are trademarks of UPL NA

Authority® First, Authority® Maxx, Authority® MTC,and Upbeet® are trademarks of FMC
Corporation

Cotoran® is a trademark of ADAMA

Valor is a trademark of Valent U.S.A LLC

©20XX Syngenta

For non-emergency (e.g., current product information), call

Dual Magnum Herbicide
66

Syngenta Crop Protection at 1-866-Syngent(a) (866-796-4368).

Manufactured for:
Syngenta Crop Protection, LLC
P. O. Box 18300
Greensboro, North Carolina 27419-8300


Dual Magnum
 Herbicide 816 MAS 1222 AMEND APR2024-HI – di – 4/29/2024
000100-00816.20240430.Dual_Magnum_Herb.AMEND.APR2024-HI