crop-chem-docs/corpus/epa_ppls/19713-555.md

# Drexel Me-Too-Lachlor IV Herbicide

- EPA Reg No: **19713-555**
- Registrant: DREXEL CHEMICAL COMPANY
- Signal word: Caution
- Active ingredients: Metolachlor (84.4%)
- Label accepted: 2023-01-04
- Source PDF: https://www3.epa.gov/pesticides/chem_search/ppls/019713-00555-20230104.pdf

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UNITED STATES ENVIRONMENTAL PROTECTION AGENCY 
 WASHINGTON, DC 20460 
 
 
 
OFFICE OF CHEMICAL SAFETY 
AND POLLUTION PREVENTION 
 
January 4, 2023 
 
Anna Hale 
Registration Manager 
Drexel Chemical Company 
P.O. Box 13327 
Memphis, TN 38113-0327 
 
Subject: Registration Review Label Amendments Incorporating Mitigation Measures from 
the Interim Decision for Metolachlor and the National Marine Fisheries Services’ 
(NMFS) Biological Opinion on the Effects of Metolachlor on Pacific Salmonids 
 Product Name: Drexel Me-Too-Lachlor IV Herbicide 
 EPA Registration Number: 19713-555 
 Application Date: March 29, 2021, and July 12, 2021 
Decision Number: 572799 and 577101 
 
Dear Ms. Hale: 
 
The Agency, in accordance with the Federal Insecticide, Fungicide and Rodenticide Act 
(FIFRA), as amended, has completed reviewing all the information submitted with your 
application to support the Registration Review of the above referenced product in connection 
with the Metolachlor Interim Decision. The Agency has concluded that your submission is 
acceptable. The label referred to above, submitted in connection with registration under FIFRA, 
as amended, is acceptable. 
 
This letter also addresses the label mitigation resulting from the NMFS’ Biological Opinion on 
the effects of Metolachlor on Pacific salmonids. The Agency has concluded that your submission 
is also acceptable. The label referred to above, submitted in connection with registration under 
FIFRA, as amended, is acceptable. 
 
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 the Federal Insecticide Fungicide and Rodenticide 
Act and is subject to review by the Agency. If the website is false or misleading, the product 
would be misbranded and unlawful to sell or distribute under FIFRA section 12(a)(1)(E). 40 
CFR 156.10(a)(5) list examples of statements EPA may consider false or misleading. In addition, 
regardless of whether a website is referenced on your product’s label, claims made on the 
website may not substantially differ from those claims approved through the registration process. 
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 website will be referred to the EPA’s Office of Enforcement and Compliance.

Page 2 of 2 
EPA Reg. No. 19713-555 
Decision No. 572799 and 577101 
 
A stamped copy of your labeling 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 
CFR 152.130(c), you may distribute or sell this product under the previously approved 
labeling for 12 months from the date of this letter. After 12 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 CFR 152.3. 
 
If you have any questions about this letter, please contact Carolyn Smith at 
smith.carolyn@epa.gov. 
 
 Sincerely, 
 
 
 Linda Arrington, Branch Chief 
 Risk Management and Implementation Branch 4 
 Pesticide Re-Evaluation Division 
 Office of Pesticide Programs 
 
 
 
Enclosure

555SP-0321asteriskPending.indd 1 3/29/2021 1:53:21 PM
Me-Too-Lachlor TM IV
Herbicide
For weed control in Field Corn and Popcorn.
ACTIVE INGREDIENT: 
Metolachlor: 2-chloro- N-(2-ethyl-6methylphenyl)-N-(2-
methoxy-
1-methylethyl) acetamide ................................... 84.4% 
OTHER INGREDIENTS: .......................................... 15.6% 
TOTAL: ............................................................ 100.0% 
This product contains 7.8 pounds of active ingredient per gallon.
KEEP OUT OF REACH OF CHILDREN 
CAUTION 
(See FIRST AID Below)
(See Side (Back) Panel for FIRST AID); 
(See Page ___ for FIRST AID)
(See Container Labeling for (FIRST AID and) 
Complete Directions for Use) (See 
(Attached) Booklet (Container Labeling) 
for Complete Directions for Use)
(SHAKE WELL BEFORE USING); 
(Recirculate Contents Before Use)
EPA Reg. No. 19713-555 Net Content: 
EPA Est. No. 19713-XX-X ______Gals. (_____L)
FIRST AID
IF INHALED:
• Move person to fresh air.
• If person is not breathing, call 911 or an ambulance, then give 
artificial respiration, preferably mouth-to-mouth, if possible.
IF ON SKIN OR CLOTHING:
• Take off contaminated clothing.
• Rinse skin immediately with plenty of water for 15 to 20 minutes.
IF IN EYES:
• Hold eye open and rinse slowly and gently with water for 15 to 20 
minutes.
• Remove contact lenses, if present, after the first 15 minutes, then 
continue rinsing eye.
IF SWALLOWED:
• Call a poison control center or doctor immediately for treatment 
advice.
• Have person sip a glass of water if able to swallow.
• Do not induce vomiting unless told to do so by a poison control 
center or doctor.
• Do not give anything by mouth to an unconscious or convulsing 
person.
Call a poison control center or doctor for treatment advice. Have the 
product container or label with you when calling a poison control 
center or doctor, or going for treatment. You may also call 
CHEMTREC at 800-424-9300 for emergency medical treatment 
information.
FOR CHEMICAL SPILL, LEAK, FIRE OR EXPOSURE CALL TOLL 
FREE 1-800-424-9300.
ME-TOO-LACHLOR and the DREXEL logo are either trademarks or registered trademarks of 
Drexel Chemical Company.
PRECAUTIONARY STATEMENTS
Hazards to Humans and Domestic Animals
CAUTION: Harmful if swallowed. Causes moderate eye irritation. 
Wash thoroughly with soap and water after handling and before 
eating, drinking, chewing gum, or using tobacco. Avoid contact with 
eyes or clothing. Wear protective eye wear. Wear long-sleeved shirt 
and long pants, socks, shoes and gloves.
PERSONAL PROTECTIVE EQUIPMENT (PPE) 
Applicators and other handlers must wear:
• Coveralls over short-sleeved shirt and short pants
• Chemical-resistant gloves made of EDUULHUODPLQDWHRUYLWRQ•
mils
• Chemical-resistant footwear plus socks
• Chemical-resistant headgear for overhead exposure
• Chemical-resistant apron when cleaning equipment
Follow manufacWXUHU¶VLQVWUXFWLRQVIRUFOHDQLQJ௘௘௘௘PDLQWDLQLQJ33(,I
no such instructions for washables exist, use detergent and hot 
water. Keep and wash PPE separately from other laundry.
USER SAFETY RECOMMENDATIONS
Users should: 1) Wash hands before eating, drinking, chewing gum, 
using tobacco or using the toilet. 2) Remove clothing immediately if 
pesticide gets inside. Then wash thoroughly and put on clean 
clothing. 3) 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.
ENGINEERING CONTROL STATEMENTS
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 [40 CFR 170.240(d)(4)]. When using the closed system, the PPE 
requirements for mixers and loaders 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 170.240(d)(4-6)], the handler PPE 
requirements may be reduced or modified as specified in the WPS. 
ENVIRONMENTAL HAZARDS
Reporting Ecological Incidents: To report ecological incidents, including 
mortality, injury, or harm to plants and animals, call (901) 774-4370.
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 rinsate or equipment washwater.
Reporting Ecological Incidents:
To report ecological incidents, including mortality, injury, or harm to plants and 
animals, call 1-901-774-4370.
Groundwater Advisory
This chemical is known to leach through soil into groundwater under certain 
conditions as a result of label use. This chemical may leach into groundwater 
if used in areas where soils are permeable, particularly where the water table 
is shallow.
Surface Water Advisory
This product may impact surface water quality due to runoff of rain water. This 
is especially true for poorly draining soils and soils with shallow groundwater. 
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
METOLACHLOR
 GROUP
 15
 HERBICIDE
Jan 04, 2023
19713-555

steriskPending.indd 2 3/29/2021 1:53:21 PM
Manufactured By:
Drexel Chemical Company
P.O. Box 13327, Memphis, 
TN 38113-0327
555SP-0321*Pending ME-TOO-LACHLOR 
IV PAGE 1 of 9 features such as ponds, 
streams and springs will reduce the 
potential loading of Metolachlor from runoff 
water and sediment. Runoff of this product 
will be reduced by avoiding application 
when rainfall or irrigation is expected to 
occur within 48 hours.
0L[LQJ௘௘/RDGLQJ,QVWUXFWLRQV
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 antisiphoning devices must be used on all mixing 
DQG௘௘RULUULJDWLRQHTXLSPHQW
This product may not be mixed or loaded within 50 feet of perennial 
or intermittent streams and rivers, natural or impounded lakes and 
UHVHUYRLUV7KLVSURGXFWPD\QRWEHPL[HG௘௘ORDGHGRUXVHGZLWKLQ
feet of all wells, including abandoned wells, drainage wells, and sink 
holes. Operations that involve mixing, loading, rinsing, or washing of 
this product into or from pesticide handling or application equipment 
or containers within 50 feet 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. 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. Surface water 
shall not be allowed to either flow over or from the pad, which means 
the pad must be self-contained. The pad shall be sloped to facilitate 
material removal. 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. 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. Containment capacities as described above 
shall be maintained at all times. The above-specified minimum 
containment capacities do not apply to vehicles when delivering 
pestLFLGHVKLSPHQWVWRWKHPL[LQJ௘௘ORDGLQJVLWH
NON-TARGET ORGANISMS 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 nontarget 
organisms by following label directions intended to minimize spray
drift.
GENERAL INFORMATION
Observe all use precautions and limitations on the labels of each 
product used in tank-mixtures. Tank-mixtures are permitted only in 
those states where the tank-mix partner is registered.
Me-Too-Lachlor IV is a herbicide recommended as a pre-plant 
surface-applied, pre-plant incorporated, or pre-emergence treatment 
in water or fluid fertilizer for control of most annual grasses and certain 
broadleaf weeds in Field corn and Popcorn. 
Note: Do not use in nurseries, turf, or landscape plantings. Do not 
apply under conditions which favor runoff or wind erosion of soil 
containing this product to non-target areas. To prevent off-site 
movement due to runoff or wind erosion:
1) Avoid treating powdery dry or light sand soils when conditions are 
favorable for wind erosion. Under these conditions, the soil surface 
should first be settled by rainfall or irrigation.
2) Do not apply to impervious substrates such as paved or highly 
compacted surfaces.
3) Do not use tailwater from the first flood or furrow irrigation of 
treated fields to treat non-target crops unless at least one-half inch 
of rainfall has occurred between application and the first irrigation. 
Where directions on this label specify, this product in tank-mixture 
with Atrazine formulations may be used. Follow the rates, 
recommendations, and limitations on the Atrazine product label. 
Note: 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.
If this product is incorporated, any supplemental tillage before planting 
must not exceed the depth of incorporation. 
Dry weather following pre-emergence application of this product or a 
tank-mixture may reduce effectiveness. Cultivate if weeds develop. 
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.
Use Precautions: Injury may occur following the use of this product 
under abnormally high soil moisture conditions during early 
development of the crop. Do not use on Peat or Muck soils. Do not 
graze or feed forage from treated areas for 30 days following 
application.
MIXING INSTRUCTIONS
This Product Alone: Mix this product with water or fluid fertilizer and apply as 
a spray. Fill the spray tank one-half to three-quarters full with water or fluid 
fertilizer, add the proper amount of this product, then add the rest of the water 
or fluid fertilizer. Provide sufficient agitation during mixing and application to 
maintain a uniform emulsion. Tank-Mixtures: Fill the spray tank one-fourth full 
with water, and start agitation; add 2,4-D, Atrazine, Banvel ®, Linuron, 
Marksman®, Prowl®, Simazine or Atrazine + Simazine, and allow it to become 
dispersed; then add this product, then add Gramoxone ® Extra, Landmaster®
BW, or Glyphosate if these products are being used; and finally the rest of the 
water. For tank-mixtures with Atrazine, Banvel, Linuron, Marksman, Prowl*, 
Simazine or Atrazine + Simazine, fluid fertilizers may replace all or part of the 
water as carrier, except in the Atrazine post-emergence and the Banvel post-
emergence tank-mixes. For tank-mixtures with Atrazine, see additional mixing 
instructions on the Atrazine label. For each mixture, check compatibility with fluid 
fertilizer, as described in Appendix A, before mixing in spray tank. For all tank-
mixtures, agitate during mixing and application to maintain a uniform 
suspension.
*See Special Mixing Instructions for tank-mixtures with Atrazine or Simazine 
+ Prowl under the appropriate tank-mixture section. For directions on how to 
conduct a compatibility test, see Appendix A.
DIRECTIONS FOR USE
This product is intended for use in weed control in Field corn and Popcorn. It is 
a violation of Federal law to use this product in a manner inconsistent with its 
labeling. 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. 
Do not enter or allow worker entry into treated areas during the 
Restricted-Entry Interval (REI) of 12 hours. 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:
• Coveralls
• Chemical-resistant gloves made of barrier laminate or viton
• Shoes plus socks 
FAILURE TO FOLLOW THE DIRECTIONS FOR USE AND USE 
PRECAUTIONS ON THIS LABEL MAY RESULT IN POOR WEED 
CONTROL, CROP INJURY, OR ILLEGAL RESIDUES.

ME-TOO-LACHLOR IV 
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HERBICIDE RESISTANCE MANAGEMENT
METOLACHLOR GROUP 15 HERBICIDE
For resistance management, this product is a Group 15 mode of 
action herbicide. Any weed population may contain or develop plants 
naturally resistant to this product and other Group 15 mode of action 
herbicides. The resistant biotypes may dominate the weed population 
if these herbicides are used repeatedly in the same field. Appropriate 
resistance management strategies should be followed.
ME-TOO-LACHLOR IV PAGE 2 of 9
To delay herbicide resistance, take one or more of the following steps:
• Rotate the use of this product or other Group 15 mode of action 
herbicides within a growing season sequence or among growing 
seasons with different herbicide groups that control the same weeds 
in a field. 
• Use tank-mixtures with herbicides from a different group if such use 
is permitted; where information on resistance in target weed species 
is available, use the less resistance-prone partner at a rate that will 
control the target weed(s) equally as well as the more resistance-
prone partner. Consult your local extension service or certified crop 
advisor if you are unsure as to which active ingredient is currently 
less prone to resistance. • Adopt an integrated weed-management 
program for herbicide use that includes scouting and uses historical 
information related to herbicide use and crop rotation, and that 
considers tillage (or other mechanical control methods), cultural 
(e.g., higher crop seeding rates; precision fertilizer application 
method and timing to favor the crop and not the weeds), biological 
(weedcompetitive crops or varieties) and other management 
practices. • Scout after herbicide application to monitor weed 
populations for early signs of resistance development. Indicators of 
possible herbicide resistance include: (1) failure to control a weed 
species normally controlled by the herbicide at the dose applied, 
especially if control is achieved on adjacent weeds; (2) a spreading 
patch of non-controlled plants of a particular weed species; (3) 
surviving plants mixed with controlled individuals of the same 
species. If resistance is suspected, prevent weed seed production 
in the affected area by an alternative herbicide from a different group 
or by a mechanical method such as hoeing or tillage. Prevent 
movement of resistant weed seeds to other fields by cleaning 
harvesting and tillage equipment when moving between fields, and 
planting clean seed. 
• If a weed pest population continues to progress after treatment with 
this product, discontinue use of this product, and switch to another 
management strategy or herbicide with a different mode of action, if 
available. 
• Contact your local extension specialist or certified crop advisors for 
additional pesticide resistance-management and/or integrated 
weed-management recommendations for specific crops and weed 
biotypes. 
• For further information or to report suspected resistance, contact 
Drexel Chemical Company representatives at (901) 774-4370.
1) SOIL TEXTURES AND HERBICIDE RATES
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
Loam 
Silt loam 
Silt
Sandy clay loam
Silty clay loam
Clay loam
Sandy clay
Silty clay
Clay
Within rate ranges in the rate tables and elsewhere on this label, 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.
Note: This product may be applied pre-emergence alone, or in 
combination with tank-mix partners specified on this label, following 
pre-plant incorporated herbicides when used according to their label 
recommendations, provided that such use is not prohibited on the 
respective labels.
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.
2) APPLICATION PROCEDURES Application Timing
This product alone or in some tank-mixtures with other labeled 
herbicides may be applied for weed control in Field corn and Popcorn 
at various times. Refer to the given crop section of the label to 
determine if application timings listed below are recommended.
A) Pre-plant Surface-Applied: For minimum-tillage or no-tillage 
systems only, this product alone and some tank-mixtures of this 
product may be applied up to 45 days before planting. Use only 
split applications for treatments made 30 to 45 days before 
planting, with two-thirds the recommended broadcast rate for the 
crop and soil texture applied initially and the remaining one-third 
at planting. Treatments less than 30 days before planting may be 
made either as a split or a single application. If weeds are present 
at the time of treatment, apply in a tank-mixture combination with 
a contact herbicide (for example, Gramoxone Extra or 
Glyphosate). Observe directions for use, use precautions, and 
restrictions on the label of the contact herbicide. 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.
B) Pre-plant Incorporated: Apply this product to the soil and 
incorporate into the top 2 inches of soil within 14 days before 
planting, using a finishing disk, harrow, rolling cultivator, or similar 
implement capable of providing uniform 2 inch incorporation. Use 
a pre-plant incorporated application if furrow irrigation is used or 
when a period of dry weather after application is expected. If Field 
corn and Popcorn will be planted on beds, apply and incorporate 
this product after bed formation, unless specified otherwise.
C) Pre-emergence: Apply this product during planting (behind the 
planter) or after planting, but before weeds or Field corn and 
Popcorn emerge.
3) Special Application Procedures
A) CA Only (Field corn and Popcorn)—Pre-plant Incorporated:
Broadcast this product alone or with tank-mix partners listed on 
this label to the soil and thoroughly incorporate with a disk or 
similar implement set to till 4 to 6 inches deep. For more thorough 
incorporation, till the soil in 2 different directions (cross-till). Field 
corn and Popcorn may be planted on flat surface or on beds. 
Caution should be used when forming the beds that only soil from 
this product’s treated zone is used (i.e., untreated soil should not 
be brought to soil surface). If the application is made to preformed 
beds, incorporate this product with a tillage implement set to till 2 
to 4 inches deep. Care should be taken during tilling to keep the 
tilled (this product treated) soil on the beds.
B) Pre-emergence: Apply this product after planting. Water with 
sprinkler or flood irrigation within 7 to 10 days.
C) Fall Application (Only in IA, MN, ND, SD, WI, and portions of 
NE and IL - see specific instructions for timing of application 
and other information): Do not apply to frozen ground. Use on 
Medium and Fine soils with greater than 2.5% organic matter that 
will be planted to Field corn or Popcorn the next Spring. Ground 
may be tilled before or after application. Do not exceed a 2 to 3 
inch incorporation depth if tilled after treatment. Note: If a Spring 
application is made, the total rate of the Fall plus Spring 
applications must not exceed the maximum total rate for the 
specific crop, or illegal residues may result.
D) Ground Application: Apply this product alone or in tankmixtures 
by ground equipment in a minimum of 10 gallons of spray mixture 
per acre, unless otherwise specified.
Use sprayers that provide accurate and uniform application. For 
tank-mixtures of this product with wettable powder or dry flowable 
formulations, screens and strainers should be no finer than 50 
mesh. Rinse sprayer thoroughly with clean water immediately after 
use.
Calculate the amount of herbicide needed for band treatment by the 
formula.
band width in inches broadcast rate amount 
needed row width in inches x per acre= per acre of 
field
Note: For information on applying in lower volumes of carrier, see 
“LOW CARRIER APPLICATION” in Appendix B.
For application by air or through center pivot systems, see

steriskPending.indd 4 3/29/2021 1:53:21 PM
Appendices C and D. Appendix C includes “MANDATORY 
SPRAY DRIFT MANAGEMENT” and “SPRAY DRIFT 
ADVISORIES” sections.
For information on impregnating dry fertilizer, see Appendix E.
PAGE 3 of 9

ME-TOO-LACHLOR IV 
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THIS PRODUCT APPLIED ALONE
1) WEEDS CONTROLLED
Barnyardgrass
(Watergrass)
Bristly foxtail
Carpetweed
Common waterhemp
Crabgrass
Crowfootgrass
Eastern black 
nightshade
Fall panicum
Foxtail millet
Galinsoga
Giant foxtail
Goosegrass
Green foxtail
Pigweed
Prairie cupgrass
Red rice
Robust foxtails
(purple, white)
Signalgrass
(Brachiaria)
Southwestern 
cupgrass
Tall waterhemp
Wild proso millet* 
Witchgrass
Woolly cupgrass*
Yellow foxtail
Yellow nutsedge
Florida pusley
*For control of these weeds refer to the “WOOLLY CUPGRASS” and 
“WILD PROSO MILLET CONTROL PROGRAM” section of this 
label.
2) WEEDS PARTIALLY CONTROLLED*:
Common purslane Sandbur Volunteer sorghum
Eclipta Seedling Johnsongrass Wild proso millet Florida 
beggarweed** Shattercane Woolly cupgrass
Hairy nightshade Texas panicum***
*See “GENERAL INFORMATION”section. Control of these weeds 
can be erratic, due partially to variable weather conditions. 
Control may be improved by following these suggested 
procedures:
A) Use 2 to 2.67 pints per acre or the pre-plant surface-applied rates 
for this product alone or in tank-mixture, if allowed, when making 
pre-plant incorporated or preemergence applications.
B) Thoroughly till moist soil to destroy germinating and emerged 
weeds. If this product is to be applied pre-plant incorporated, this 
tillage may be used to incorporate this product if uniform 2 inch 
incorporation is achieved as recommended under “APPLICATION 
PROCEDURES”.
C) Plant Field corn and Popcorn into moist soil immediately after 
tillage. If this product is to be used pre-emergence, apply at 
planting or immediately after planting.
D) If available, sprinkler irrigate within 2 days after application. Apply 
one-half to 1 inch of water. Use lower water volume (one-half inch) 
on Coarse-textured soils and higher volume (1 inch) on Fine-
textured soils . Also, refer to the section on “ CENTER PIVOT 
IRRIGATION APPLICATION” for this method of applying this 
product.
E) 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, a uniform, shallow cultivation is 
recommended as soon as weeds emerge.
**For partial control of this weed, use a minimum of 2 pints per acre 
and apply pre-emergence.
***For partial control of this weed, use a minimum of 2 pints per acre 
and apply through a center pivot irrigation system.
3) ROTATIONAL CROPS
This Product Alone:
A) If crop treated with this product alone is lost, either Field corn or 
Popcorn may be replanted immediately. Do not make a second 
broadcast application of this product. If the original application 
was banded and the second crop is planted in the untreated row 
middles, a second banded treatment may be applied.
B) Barley, Oats, Rye, or Wheat may be planted 4.5 months following 
treatment; Alfalfa may be planted 4 months following application. 
Tomatoes may be planted 6 months following application. 
C) Field corn and Popcorn, in addition to Barley, Buckwheat, 
Cabbage, Cotton, Peanuts, Pod crops, Potatoes, Safflower, 
Grain or Forage Sorghum, Soybeans, Milo, Oats, Peppers, Rice, 
Root crops, Rye, Tobacco, or Wheat may be planted in the next 
Spring following treatment. Clover may be seeded 9 months 
following application. Do not graze or feed forage or fodder from 
Cotton to livestock. 
D) Following a lay-by treatment or multiple treatments applied the 
previous season, Field corn and Popcorn in addition to Cabbage, 
Peppers or Tobacco may be planted in the Spring. All other 
rotational crops may be planted 12 months after a lay-by 
application.
This Product In Tank-Mixtures:
For Rotational Crop restrictions for this product used in tank-
PL[ WX U H V U H IH U WR WK H V WD WH PH Q WV ௘ ௘ U H VWU L FWLR Q VD E R YH IR U WK LV SURGXFW
and to the respective product labels of any mixing partner(s) for 
DGGLWLRQDOVWDWHPHQWV௘௘UHVWULFWLRQVImportant Notes: To avoid injury 
to rotational Alfalfa or Clover: (1) Do not apply more than 2 pounds 
a.i. per acre (2 pts. of this product) pre-emergence (including pre-
plant surface, pre-plant incorporated, post-plant incorporated, etc.), 
and (2) Do not make lay-by or other post-emergent applications of 
this product.
CORN (FIELD, POP) — THIS PRODUCT ALONE
Apply this product either pre-plant surface, pre-plant incorporated or 
pre-emergence using the appropriate rate specified below.
1) PRE-PLANT SURFACE-APPLIED
Refer to instructions for use of this product alone under 
“APPLICATION PROCEDURES”.
A) Fall Application (Apply after September 30 in MN, ND, SD, 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):
In all locations, apply to crop stubble after harvest when the 
sustained soil temperature at a 4 inch depth is less than 55°F and 
falling. In minimum-till or no-tillage systems on soils having 
greater than 2.5% organic matter, use 1.67 to 2 pints per acre on 
Medium-textured and 2 pints per acre on Fine-textured soils. Do 
not apply to frozen ground. A tillage operation may precede the 
DSSOLFDWLRQ$)DOODQG௘௘RUD6SULQJWLOODJHPD\IROORZDSSOLFDWLRQ
but do not exceed an incorporation depth greater than 2 to 3 
inches. Minimize furrow and ridge formation in the tillage 
operations. Note: If a Spring application is made, the total rate of 
the Fall plus Spring applications must not exceed the maximum 
total rate for Corn, or illegal residues may result.
B) Use on Medium and Fine-textured soils with minimum-tillage or 
no-tillage systems in CO, IA, IL, IN, KS, KY, MN, MO, MT, ND, 
NE, SD, TN, WI, and WY. Apply two-thirds of the recommended 
UDWHRIWKLVSURGXFWSWV௘௘$RQMedium soils DQGSWV௘௘A on 
Fine soils) as a split treatment 30 to 45 days before planting and 
the remainder at planting. Applications made less than 30 days 
prior to planting may be as either a split or single treatment. Apply 
1.33 pints per acre on Coarse soils not more than 2 weeks prior 
to planting.
C) On Medium and Fine-textured soils with minimum- or notillage
systems in CT, DE, MA, MD, ME, MI, NH, NY, OH, PA, RI, VA, 
VT, and WV, pre-plant surface applications may be applied 
following the directions for use above. If the amount of rainfall 
results in unsatisfactory length of weed control following the 
earlier treatment, a post-emergence application of an 
DSSURSULDWHO\ODEHOHGEURDGOHDIDQG௘௘RUJUDVVZHHGKHUELFLGHPD\
be used, i.e., Accent
®, Atrazine, Banvel, Basagran, Beacon ®,
Bicep®, Bromoxynil (Brominal® or Buctril®), Exceed®, or 2,4-D. If 
the post-emergence treatment includes the herbicide used pre-
plant surface-applied, do not exceed the total labeled rate for 
Field corn and Popcorn on a given soil texture. Observe all 
directions for use, use precautions, and limitations on the label of 
the post-emergent herbicide.
2) PRE-PLANT INCORPORATED OR PRE-EMERGENCE
Follow instructions for use of this product alone under 
“APPLICATION 
PROCEDURES”. On Coarse soils, apply 1 to 1.33 pints per acre of 
this product if organic matter content is less than 3%, or 1.33 pints
per acre if organic matter content is 3% or greater. On Medium soils,
apply 1.33 to 1.67 pints per acre of this product. On Fine soils, apply 
1.33 to 1.67 pints per acre of this product if organic matter content is 
less than 3%, or 1.67 to 2 pints per acre if organic matter content is 
3% or greater. Lay-by: To extend the duration of weed control in Field 
corn and Popcorn, a maximum rate of 2 pints per acre of this product 
may be applied after Corn emergence until the Corn plants reach 40 
inches in height, following any pre-plant surface-applied, pre-plant 
incorporated, or pre-emergence herbicide application, including this 
product. For best results, applications should be made to soil free of 
emerged weeds and directed towards the base of Corn plants in 
excess of 5 inches tall. The total rate of this product applied on Field 
corn and Popcorn during any one crop year should not exceed 4 pints 
per acre, depending on soil texture.
PAGE 4 of 9

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Use Precautions for all applications to Corn: To avoid possible 
illegal residues, do not graze or feed forage from treated areas for 30 
days following application. Do not use on Peat or Muck soils.
Shattercane, Wild Proso Millet, Woolly Cupgrass, and Eclipta —
Partial Control: For more consistent partial control of Shattercane, 
Wild proso millet, Woolly cupgrass, or Eclipta, apply 2 to 2.55 pints 
per acre as a single application; or apply 1 to 1.33 pints per acre of 
this product pre-plant incorporated followed by 1 to 1.33 pints per 
acre of this product pre-emergence; however, do not apply more than 
a total of 2.55 pints per acre. Make the pre-emergence application 
during or after planting, but bef ore weeds and Corn emerge. Apply 
the 1.33 pints per acre rate of this product when a heavy infestation 
of Shattercane, Wild proso millet, Woolly cupgrass, or Eclipta is 
expected. A shallow cultivation may be needed to control any late 
emerging weeds.
Woolly Cupgrass and Wild Proso Millet Control Program: For 
control of these species, use the following 3 step program: 
1) Apply this product early pre-plant, pre-plant incorporated, or pre-
emergence at 1.67 pints per acre on Medium soils and 2 pints per 
acre on Fine-textured soils up to the maximum label rate. Lightly 
incorporate with a rotary hoe if rainfall does not occur within 5 to 
7 days. 
2) Apply a post-emergence tank-mix of Beacon at 0.38 ounce per 
acre or Exceed at 1 packet per 4 acres plus Accent SP at 0.33 
ounce per acre plus 1 quart of crop oil concentrate plus 1 gallon 
per acre of 28% nitrogen, or the equivalent amount of ammonium 
sulfate, when grasses are 2 to 3 inches tall and the Field corn and 
Popcorn is at least 4 inches tall. 3) Cultivate 14 to 21 days after 
the post-emergence application.
Notes:
1) Do not apply more than the labeled application rate for a given 
soil texture per year, either as a single or split treatment, or illegal 
residues may result. 
2) In Field corn and Popcorn, this product may be used up to 2.75 
pints per acre as either a pre-plant surface, pre-plant 
incorporated, or pre-emergence treatment on soils having an 
organic matter content between 6% and 20% or up to 2 pints per 
acre on any soil for extended residual control and where severe 
stands of problem weeds are expected.
3) In the event of escape of annual weeds following a pre-plant 
surface, pre-plant incorporated, or pre-emergence treatment of 
this product, follow with a post-emergence application of an 
DSSURSULDWHO\ODEHOHGEURDGOHDIDQG௘௘RUJUDVVZHHGKHUELFLGHLH
Accent, Atrazine, Banvel, Basagran, Beacon, Bicep, Brominal, 
Buctril, Exceed, or 2,4-D. If the post-emergence treatment 
includes the herbicide used in earlier treatment, i.e., Atrazine, do 
not exceed the total labeled rate for Field corn and Popcorn on a 
given soil texture. 
4) Brominal or Buctril may be applied post-emergence alone or in 
tank-mix combination with Atrazine. Do not exceed 1.2 pounds of 
Atrazine per acre in tank-mix combination with Brominal or Buctril 
post-emergence. Refer to the Atrazine, Brominal, and Buctril 
labels for specific rates and use precautions. 5) Do not use this 
product on Peat or Muck soils.
THIS PRODUCT IN TANK-MIXTURES*
This product in any tank-mixture for Field corn and Popcorn (except 
this product + Atrazine post-emergence and this product + Banvel 
post-emergence) may be applied in water or fluid fertilizer. Use only 
water in this product + Atrazine or this product + Banvel post-
emergence tank-mixes.
Note: For all applications to Field corn and Popcorn, do not graze or 
feed forage from treated areas for 30 days following application, or 
possible illegal residues may result. *This product may be tank-mixed 
with the herbicides listed on this label provided the specific product(s) 
tank-mixed is registered for use on Field corn and Popcorn.

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IMPORTANT: FOR TANK-MIXTURES WITH ATRAZINE — If 
applying this product in tank-mixture with Atrazine, all the 
restrictions and rate limitations on the Atrazine label must be 
IROORZHGLIPRUHUHVWULFWLYH௘௘protective than those on this label. In 
DGGLWLRQLI$WUD]LQHLV௘௘PXVWEHDSSOLHGDWUDWHVORZHUWKDQWKRVH
recommended on this label, broadleaf weed control may be 
affected. Refer to the Atrazine label for weeds controlled at the 
reduced rates.
Chart 1: This Product in Tank-Mixtures — Additional Weeds Controlled and Special Instructions 
This Product + 
$WUD]LQHDQG௘௘RU
Simazine
(Pre-plant Surface, 
PPI, PRE)
This Product + 
Atrazine 
(Post)
This Product + 
Banvel 
(Field Corn)
This Product + 
Atrazine + Linuron
This Product + 
Atrazine or 
Simazine + Prowl
This Product + 
Marksman
Special Mixing 
Instructions 1
Comments 2, 3, 4, 5, 7,8 2, 3, 4, 5 2, 3, 4, 5, 6 2, 3, 4, 5 7
Browntop panicum X X X
Cocklebur X O O X X X
Common purslane X X X X
Hairy nightshade X X X X
Jimsonweed X O X
Kochia X X
Lambsquarters X X XXXX
Morningglory X O O X X X
Mustard X X
Pigweed XXX
Prickly sida X X
R a g w e e d XXXXXX
S m a r t w e e d XXXXXX
V e l v e t l e a f XXOXXX
X = control; O = partial control;
COMMENTS — Chart 1: This Product In Tank-Mixtures
1) Special Mixing Instructions for this product + Atrazine or 
Simazine and Prowl.
A) Fill the spray tank one-quarter full with water or fluid fertilizer and start 
agitation.
B) To aid compatibility, add a compatibility agent, such as Unite or X-77®,
at 4 pints per 100 gallons of spray mixture. 
C) Then add the Atrazine or Simazine and allow it to become dispersed.
D) Then add this product and Prowl 4E.
E) Add the rest of the water.
2) Although a single formulation for Atrazine or Simazine is
listed in the rate tables, other formulations may be 
substituted using the following formula:
• 1 pound of Atrazine 90DF or Simazine 90DF = 1.8 pints o
f 
Atrazine 4L or Simazine 4L
3) Follow the rates, recommendations and limitations on the Atrazine 
label.
4) See additional mixing instructions on the Atrazine label.
PAGE 5 of 9

ME-TOO-LACHLOR IV 
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5) Use Precautions:Do not exceed a total of 2.5 pounds of Atrazine 
per acre per year. However, 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.
6) Other formulations of Linuron can be used:
• 1 pound of Linuron DF = 1 pint of Linuron 4L
7) In Minimum-Tillage and No-Tillage systems, mix with Gramoxone 
Extra for control of most emerged annual weeds and suppression 
of perennial weeds; or with Landmaster BW for suppression of 
emerged Field bindweed and control or suppression of annual 
weeds; or with Glyphosate for control of most emerged annual 
and perennial weeds.
8) Refer to label section on specific directions for 2,4-D or Banvel 
burndown combinations in Minimum-Tillage and NoTillage 
systems.
This product in any tank-mixture for Field corn and Popcorn may be 
applied in water or fluid fertilizer, except as noted.
Notes:
1) For all applications to Field corn and Popcorn, do not graze or 
feed forage from treated areas for 30 days following application, 
or possible illegal residues may result.
2) When applying this product in tank-mixture with Atrazine, do not 
exceed a total of 2.5 pounds of Atrazine per acre per year.
3) Refer to “ CORN (FIELD, POP) — THIS PRODUCT ALONE ”,
Note 3 for recommended sequential post-emergence treatments 
if escape weeds develop.
4) This product may be used up to 2 pints per acre in combinations 
on any soil for extended residual control and where severe stands 
of problem weeds are expected.
TANK-MIXTURE WITH ATRAZINE OR SIMAZINE, OR ATRAZINE + 
SIMAZINE — PRE-PLANT SURFACE, PRE-PLANT 
INCORPORATED OR PRE-EMERGENCE
In addition to the weeds controlled by this product alone, this product 
+ Atrazine or Simazine, or this product + Atrazine + Simazine, applied 
pre-plant surface, pre-plant incorporated, or pre-emergence, also 
controls the following weeds: Browntop panicum, Cocklebur, 
Common purslane, Hairy nightshade, Lambsquarters, Morningglory, 
Ragweed, Smartweed, and Velvetleaf.
Apply this product + Atrazine or Simazine, or this product + Atrazine 
+ Simazine either pre-plant surface, pre-plant incorporated, or pre-
emergence.
Pre-plant Surface-Applied: Follow instructions for use of this 
product alone under “ APPLICATION PROCEDURES” and under 
application instructions for this product alone on Field corn and 
Popcorn. Apply this product + Atrazine or Simazine, or this product + 
Atrazine + Simazine on Medium soils  SWV௘௘$RIWK LVSURGXFW 
 WR  SWV௘௘$ RI $WUD]LQH / RU 6LPD]LQH / RU $WUD]LQH / 
Simazine 4L combined) and on Fine soils  WR  SWV௘௘$ RI WKLV
SURGXFWWRSWV௘௘$RI$WUD]LQH/RU6LPD]LQH/RU$WUD]LQH/
+ Simazine 4L combined) in minimum-tillage and no-tillage systems 
in CO, IA, IL, IN, KS, KY, MN, MO, MT, ND, NE, SD, TN, WI, and 
WY. Apply the tank-mixtures as a split or single treatment in those 
states and as indicated in the “ THIS PRODUCT — ALONE PRE-
PLANT SURFACE-APPLIED” section of the label for Corn. On 
Coarse soils, apply 1.33 pints per acre of this product and 3.2 pints 
per acre of Atrazine 4L or Simazine 4L, or Atrazine 4L + Simazine 4L 
combined.
Pre-plant Incorporated or Pre-emergence: Follow instructions for 
use of this product alone under “ APPLICATION PROCEDURES”.
Apply this product + Atrazine or Simazine, or this product + Atrazine
+ Simazine, using the appropriate rates from Table 1. Note: Do not 
apply more than the labeled rate for a given soil texture per year, 
either as a split or single treatment, or illegal residues may result.
Shattercane, Wild Proso Millet, Woolly Cupgrass, and Eclipta —
Partial Control
For more consistent partial control of Shattercane, Wild proso millet, 
Woolly cupgrass, or Eclipta, where this product is applied in tank-
mixture or sequentially with other registered Field corn and Popcorn 
herbicides apply 2 to 2.33 pints as a single application or, the 
following applications may be made:
1) Apply 1 to 1.33 pints per acre of this product plus 2 pounds per 
acre of Atrazine or Simazine pre-plant incorporated, followed by 
1 to 1.33 pints per acre of this product preemergence. Make the 
pre-emergence application during or after planting, but before 
weeds and Corn emerge.
2) Apply this product at 1.33 pints per acre alone or in tankmix 
combination with up to 2 pounds per acre of Atrazine or Simazine 
pre-plant incorporated. Do not exceed the total rate of Triazine 
herbicide recommended for Field corn and Popcorn grown on a 
given soil texture. Follow with a postdirected application of Evik
®
80W at 2.5 pounds per acre Refer to the Evik 80W label for 
specific directions for the post-directed application.
3) Apply Eradicane
® or Sutan ® (or equivalent EPTC or butylate 
formulations) at labeled rates pre-plant incorporated, followed by 
a pre-emergence application of this product at 1 to 1.33 pints per 
acre Do not use Eradicane or Sutan on soils where rapid 
degradation has been shown to occur. Make the preemergence 
application during or after planting, but before weeds and Corn 
emerge.
Use Precaution: When following the application regimes in numbers 
1 to 3 above, a shallow cultivation may be needed after the pre-
emergence or post-emergence application to help control any late 
emerging Shattercane or Wild proso millet plants.
TANK-MIXTURE WITH ATRAZINE — POST-EMERGENCE
Weeds Controlled Weeds Partially 
Controlled
Barnyardgrass
(Watergrass) 
Crabgrass
Crowfootgrass
Fall panicum
Giant foxtail
Green foxtail Prickly sida
Jimsonweed Purslane
Kochia Ragweed
Lambsquarters Smartweed
Mustard Velvetleaf
Pigweed Yellow foxtail
Cocklebur
Morningglory
Yellow nutsedge
Apply 1 pint per acre of this product + 1.3 pounds per acre of Atrazine 
90DF* on Coarse soils , 1.33 pints per acre of this product + 1.8 
pounds per acre of Atrazine 90DF on Medium soils, or 1.33 to 1.67 
pints per acre of this product + 1.8 to 2.2 pounds per acre** of 
Atrazine 90DF on Fine soils. Apply this tank-mixture before grass and 
broadleaf weeds pass the 2 leaf stage and before Field corn and 
Popcorn exceeds 5 inches in height. Application to weeds larger than 
the 2 leaf stage will generally result in unsatisfactory control.
Lay-by: Apply to Field corn and Popcorn plants not more than 12 
inches tall. Applications to Corn in excess of 5 inches should be 
directed to the base of the Corn plants; whereas, applications to Corn 
plants less than 5 inches tall may be made over the top. Occasionally, 
some Corn leaf burn may result, but this should not affect later growth 
or yield. Do not apply this post-emergence tank-mixture in fluid 
fertilizer, or severe crop injury may occur. **When using Atrazine 4L, 
use equivalent rates. One pound of Atrazine 90DF equals 1.8 pints 
of Atrazine 4L.
**For better control of Cocklebur, Morningglory, Velvetleaf, and Yellow 
nutsedge on Fine-textured soils above 3% organic matter, apply 2.2 
pounds per acre of Atrazine 90DF, or equivalent rate of Atrazine 4L, 
with 1.33 to 1.67 pints per acre of this product. Tank mixtures of this 
product + Atrazine may be applied following use of any registered pre-
plant surface-applied, pre-plant incorporated or pre-emergence Field 
corn and Popcorn herbicide, including this product + Atrazine.
PAGE 6 of 9
Table 1: This Product + Atrazine or Simazine, or This Product + 
Atrazine + Simazine, Pre-plant Incorporated, or Pre-emergence 
— Corn (Field, Pop)
Soil Texture Broadcast Rates Per Acre

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Less Than 3% 
Organic Matter
3% Organic 
Matter or Greater
This 
Product
+ Atrazine 
90DF*
OR
Simazine 
90DF*
–O R –
This 
Product
+ Atrazine 
90DF**
+Simazine 
90DF**
This 
Product
+ Atrazine 
90DF*
OR
Simazine 
90DF*
–O R –
This 
Product
+ Atrazine 
90DF**
+Simazine 
90DF**
COARSE
0.85 to 
1.0 pt.
+
1.1 to 
2.2 lbs.
0.85 to 
1.0 pt.
+
0.6 to 
1.1 lbs.
+
0.6 to 
1.1 lbs.
1.0 pt.
+
1.3 to 
2.2 lbs.
1.0 pt.
+
0.7 to 
1.1 lbs.
+
0.7 to 
1.1 lbs.
MEDIUM
1.0 to 
1.33 pts.
+
1.3 to 
2.2 lbs.
1.0 to 
1.33 pts.
+
0.7 to 
1.1 lbs.
+
0.7 to 
1.1 lbs.
1.33 pts.
+
1.8 to 
2.2 lbs.
1.33 pts.
+
0.9 to 
1.1 lbs
+
0.9 to 
1.1 lbs.
FINE
1.33 pts.
+
1.8 to 
2.2 lbs.
1.33 pts.
+
0.9 to 
1.1 lbs.
+
0.9 to 
1.1 lbs.
1.33 to 
1.67 pts.
+
1.8 to 
2.2 lbs.***
1.33 to 
1.67 pts.
+
0.9 to 
1.1 lbs.***
+
0.9 to 
1.1 lbs.
Muck or Peat 
(soils with 
more than 
20% organic 
matter)
DO NOT USE
***Use Simazine in preference to Atrazine when heavy infestations of Crabgrass or Fall 
panicum are expected. On soils having between 6% and 20% organic matter, this 
SURGXFWPD\EHXVHGXSWRSWV௘௘$LQWDQN-PL[FRPELQDWLRQZLWKOEV௘௘$RI$WUD]LQH
90DF, or equivalent rates of Atrazine 4L. Refer to the Atrazine label for weeds controlled 
at this reduced rate.
**When using the tank-mixture of this product + Atrazine 90DF + Simazine 90DF, use
equal rates of each as shown when heavy broadleaf weed infestations are expected.
When heavy infestations of Crabgrass or Fall panicum are expected, use a 1:2 ratio of 
Atrazine + Simazine, instead of the 1:1 ratio given in Table 1. (Example: Total Atrazine 
')  6LPD]LQH ')   OEV௘௘$ XVH  OE RI $WUD]LQH  OE RI 6LPD]LQH
respectively.) Refer to the “ TANK-MIXTURE WITH ATRAZINE-POST-EMERGENCE”
section for Atrazine 4L and Simazine 4L conversions.
***For Cocklebur, Yellow nutsedge, and Velvetleaf control on Fine-textured soils above 
3% ***RUJDQLFPDWWHUDSSO\OEV௘௘$RI$WUD]LQH')RUHTXLYDOHQWUDWHVRI$WUD]LQH
4L, or ***the same total amount of Atrazine + Simazine with 1.33 WRSWV௘௘$RIWKLV
product.
Note: The total rate of this product should not exceed 4 pints, nor 
more than 2.5 pounds of Atrazine rate during any one crop year, or 
illegal residues may result. Refer to the Atrazine label for geographic, 
soil-texture, and rotational restrictions.
TANK-MIXTURE WITH BANVEL
Pre-emergence: Use this tank-mixture only on Field corn which is 
flat-planted (no furrows) in CO, IA, IL, IN, KS, MN, NE, OH, SD and 
WI.
In addition to the weeds controlled by this product alone, this product 
+ Banvel, applied pre-emergence, also controls Lambsquarters, 
Ragweed, Smartweed, Cocklebur*, Jimsonweed*, Morningglory*, 
and Velvetleaf*.
*Partially controlled.
Apply this product + Banvel pre-emergence. Broadcast 1 pint per acre 
of Banvel with 1.33 pints per acre of this product on Medium soils, or 
with 1.33 to 1.67 pints per acre of this product on Fine soils. Do not 
apply on Coarse soils or on soils with less than 2.5% organic matter. 
Apply this tank-mixture to the soil surface at planting or after planting, 
but before Field corn emerges. Plant seed at least 1.5 inches deep 
and apply behind planting equipment, avoiding incorporation by the 
planter wheel or other seed-covering device. Do not incorporate 
before Field corn plants emergence. If it is necessary to rotary hoe to 
break the soil crust, do not disturb the soil more than one-half inch 
deep. Use Precautions: (1) Avoid drift to sensitive non-target plants, 
such as Soybeans, during application, or injury may occur. (2) Do not 
apply with aircraft.
Post-emergence for Control of Pigweed (Mid-Atlantic states 
including DE, MD, PA, VA and WV): Apply 1 to 1.5 pints of this 
product + one-half to 1 pint per acre of Banvel by ground equipment 
when Pigweed plants are less than 3 inches tall and before Field corn 
exceeds 5 inches in height in a minimum of 20 gallons of spray per 
acre. Use the lower rate on Coarsetextured and low organic matter 
soils. Use the higher rate on Fine-textured and high organic matter 
soils.
Banvel SGF
® and Clarity® may be used at equivalent pounds of active 
ingredient per acre.
Use Precautions: (1) Avoid drift to sensitive non-target plants, such 
as Soybeans, during application, or injury may occur. (2) Do not apply 
with aircraft.
TANK-MIXTURE WITH ATRAZINE AND LINURON FOR CONTROL 
OF LAMBSQUARTERS AND PIGWEED
For prolonged control of Lambsquarters and Pigweed in DE, MD, NJ, 
NY, PA, VA and WV, this product may be applied pre-emergence in 
tank-mix combination with Atrazine + Linuron. Apply this product and 
Atrazine according to the rates in Table 1 and Linuron according to 
the following rates.
Soil Texture Broadcast Rate per 
Acre
Sandy loam (1 to 3% organic matter) 0.67 lb. Linuron
Sandy loam (3 to 6% organic matter) 1.0 lb. Linuron
Medium and Fine-textured soils 
(1 to 6% organic matter) 1.0 lb. Linuron
Observe all directions for use, use precautions, and limitations on this 
product, Atrazine and Linuron labels when applying these products in 
tank-mix combinations.
TANK-MIXTURE WITH ATRAZINE OR SIMAZINE + PROWL FOR 
PROLONGED CONTROL OF LAMBSQUARTERS AND PIGWEED 
IN FIELD CORN ONLY (NORTHEAST U.S., INCLUDING MI, IN, KY 
AND STATES EAST OF THESE)
For prolonged control of Lambsquarters and Pigweed in addition to a 
broad spectrum of annual broadleaf and grass weeds, this product in 
tank-mix combination with Atrazine* or Simazine + Prowl 4E may be 
applied after planting, but before Field corn or weeds emerge. Apply 
by ground equipment in a minimum of 10 gallons of water or 20 
gallons of liquid fertilizer. Apply by air in a minimum of 5 gallons of 
water. Refer to Table 1 of this label for rates of this product, Atrazine, 
or Simazine to be applied. Apply Prowl 4E according to the following 
rates below in Table 2.
*Do not apply this product in tank-mix combination with Atrazine 80W 
*+ Prowl, as this combination is not compatible. Other Atrazine 
formulations may be used.
Mixing Instructions: See “TANK-MIXTURE WITH ATRAZINE —
POST-EMERGENCE”.
Table 2: Prowl 4E — Broadcast Rates Per Acre
Soil Texture
Percent Organic Matter in Soil
Less Than 
1.5%
1.5 to 3% Over 3%
COARSE 1.5 to 2.0 pts. 2.0 pts. 3.0 pts.
MEDIUM 2.0 pts. 3.0 pts. 3.0 pts.
FINE 2.0 pts. 3.0 pts. 3.0 pts.
Observe all directions for use, use precautions and limitations on the 
respective product labels when applying these products in tank-mix 
combination. Refer to the Prowl 4E label for replanting instructions in 
the event of crop loss.
TANK-MIXTURE WITH ATRAZINE, OR SIMAZINE, ATRAZINE + 
SIMAZINE, WITH GRAMOXONE EXTRA, LANDMASTER BW, OR 
GLYPHOSATE FOR MINIMUM-TILLAGE OR NO-TILLAGE 
SYSTEMS
*See “TANK-MIXTURE WITH ATRAZINE — POST-EMERGENCE”
for special mixing instructions.

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In minimum-tillage or no-tillage systems where Field corn and 
Popcorn is planted directly into a cover crop, stale seedbed, 
established sod, or previous crop residues, the contact herbicides 
Gramoxone Extra, Landmaster BW, or Glyphosate may be added 
PAGE 7 of 9
to a tank-mix of this product, Atrazine, or Simazine, or this product + 
Atrazine + Simazine. See Comment No. 7 following Chart 1. This 
product + Atrazine or Simazine, or this product + Atrazine + Simazine 
portion of the tank-mixture provides pre-emergence control of the 
weeds listed on this label in the tank-mixture section for “TANK-
MIXTURE WITH ATRAZINE OR SIMAZINE, OR ATRAZINE + 
SIMAZINE — PRE-PLANT SURFACE, PREPLANT 
INCORPORATED OR PRE-EMERGENCE”.
Application: Apply before, during, or after planting, but before the 
Field corn and Popcorn emerges, at the rates specified below. Add 
Gramoxone Extra, Landmaster BW, or Glyphosate at the following 
broadcast rates:
Gramoxone Extra: 1.5 to 2, 2 to 2.5, or 2.5 to 3 pints per acre to 
1 to 3, 3 to 6, or 6 inch tall weeds, respectively. Apply surfactant 
at 1 or 2 pints per 100 gallons of spray mixture with 75% or greater 
or 50 to 74% non-ionic active ingredient, respectively. This 
treatment will not control weeds taller than 6 inches.
Note: Do not apply combinations containing Gramoxone Extra in 
suspension-type liquid fertilizers because the activity of paraquat 
will be reduced.
Landmaster BW: 27 to 54 ounces per acre depending on weed 
species and size. See the Landmaster BW label for weeds 
controlled, recommended rates for specific weeds, and other 
information concerning use.
Glyphosate: See the Glyphosate or Roundup RT label for weeds 
controlled, recommended rates, and other use precaution 
directions.
Apply in 20 to 60 gallons of water or fluid fertilizer per acre with ground 
equipment.
On Coarse soils, apply 1 pint per acre of this product with 1.3 pounds 
of Atrazine 90DF* or Simazine 90DF*, or with 0.7 pound of Atrazine 
90DF** + 0.7 pound of Simazine 90DF**. On Medium soils, apply 1.33 
pints per acre of this product with 1.8 
pounds of Atrazine 90DF or Simazine 90DF, or with 0.9 pound of 
Atrazine 90DF + 0.9 pound of Simazine 90DF. On Fine soils***, apply 
1.33 to 1.67 pints per acre of this product with 1.8 to 2.2 pounds of 
Atrazine 90DF or Simazine 90DF, or with 0.9 to 1.1 pounds of Atrazine 
90DF + 0.9 to 1.1 pounds of Simazine 90DF.
*
**Use Simazine in preference to Atrazine when heavy infestations of 
Crabgrass or Fall panicum are expected.
***When using the tank-mixture of this product + Atrazine 90DF + Simazine 
90DF, use equal rates of Atrazine and Simazine as shown when heavy 
broadleaf weed infestations are expected. When heavy infestations of 
Crabgrass or Fall panicum are expected, use a 1:2 ratio of Atrazine + 
Simazine, instead of the 1:1 ratio given. (Example: Total Atrazine 90DF + 
6LPD]LQH') OEV௘௘$XVHOERI$WUD]LQHOEVRI6LPD]LQH
respectively.) Refer to Comment No. 2 following Chart 1 for Atrazine 4L and 
Simazine 4L conversions.
***For Cocklebur, Yellow nutsedge, and Velvetleaf control on Fine-textured soils
above 3% organic matter, apply 2.25 pounds per acre of Atrazine 90DF, or 
equivalent rate of Atrazine 4L, or the same total amount of Atrazine + 
Simazine, with 1.33 to 1.67 pints per acre of this product.
TANK-MIXTURE WITH ATRAZINE; OR ATRAZINE + 2,4-D; OR
ATRAZINE + 2,4-D + BANVEL FOR MINIMUM-TILLAGE OR NO-
TILLAGE SYSTEMS
In minimum-tillage or no-tillage systems where Field corn and 
Popcorn is planted directly into a cover crop, stale seedbed, 
established sod, or previous crop residues, this product applied in 
combination with Atrazine will kill most emerged small annual weeds. 
Apply this product + Atrazine before, during, or after planting, but 
before Field corn and Popcorn emerges, according to the rates in 
Table 1.
Where heavy crop residues exist, add 0.8 to 1.6 pints per acre of an 
appropriately labeled 3.8 pounds a.i. per gallons of 2,4-D amine (such 
as Weedar
® 64, Weedar 64A, DMA-4 Herbicide, or Formula 40) to 
the spray tank last and apply in a minimum of 25 gallons of carrier 
per acre.
As carriers, nitrogen solutions and complete liquid fertilizers, applied 
before Corn emergence, enhance burndown of existing weeds, and 
therefore, are recommended instead of water. Add X-77 surfactant at 
1 to 2 quarts per 100 gallons of diluted spray, or another appropriate 
surfactant at its recommended rate, or add crop oil concentrate plus 
28% liquid nitrogen (or equivalent). Apply before weeds exceed 3 
inches in height. If Alfalfa is present, add Banvel to the spray mixture 
at 0.33 to 0.5 pint per acre and apply before Alfalfa exceeds 6 inches 
in height.
For fields with existing sod grasses (e.g., Bromegrass, Orchardgrass, 
Rye, or Timothy), when existing weeds exceed 3 inches in height or 
when very dry conditions exist, add Gramoxone Extra at the rate of 
2.5 pints per acre in place of or in addition to 2,4-D, as indicated 
above. Do not apply Gramoxone Extra in suspension-type liquid 
fertilizer. Observe all directions for use, use precautions, and 
limitations on the respective product labels when applying these 
products in tank-mix combination.
TANK-MIXTURE WITH MARKSMAN IN CONSERVATION TILLAGE 
— FIELD CORN
In conservation tillage systems where Field corn is planted directly 
into a cover crop or previous crop residue, this product + Marksman 
will kill most emerged small annual weeds. Apply this product + 
Marksman before, during, or after planting, but before Corn 
emergence on Medium and Fine soils with greater than 2.5% organic 
matter. For fields with existing vegetation exceeding 3 inches in 
height or when very dry conditions exist, add Gramoxone Extra at its 
standard rate. This product + Marksman may be applied post-
emergence to Field corn less than 3 inches tall and before weedy 
grasses exceed the 2 leaf stage. As carriers, nitrogen solutions and 
complete liquid fertilizers, applied before Corn emergence, enhance 
burndown of existing weeds. Do not apply Gramoxone Extra in 
suspension-type liquid fertilizer or use on emerged Corn.
Refer to the Marksman label and follow all directions, limitations, use 
precautions, and information regarding application and use in Field 
Corn.
STORAGE AND DISPOSAL
Do not contaminate water, food or feed by storage and disposal. 
PESTICIDE STORAGE: This product may be stored at 
temperatures down to 30°degrees below 0°F. 
For minor spills, leaks, etc., follow all precautions indicated on this 
label and clean up immediately. Take special care to avoid 
contamination of equipment and facilities during cleanup procedures 
and disposal of wastes. 
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 DISPOSAL: Do not reuse empty 
container. Triple rinse (or equivalent), puncture and dispose of in a 
sanitary landfill, or by incineration, or by open burning, if allowed by 
state and local authorities. Keep out of smoke from burning 
containers.
For Bulk and Mini Bulk Containers:
When the container is empty, replace the cap and seal all openings 
that have been opened during use; and return the container to the 
point of purchase, or to a designated location named at time of 
purchase of this product. This container must only be refilled with 
this pesticide product. DO NOT REUSE THE CONTAINER FOR 
ANY OTHER PURPOSE. Prior to refilling, inspect carefully for 
damage such as cracks, punctures, abrasions, worn-out threads and 
closure devices. Check for le aks after refi lling and before 
transporting. Do not transport if this container is damaged or leaking. 
If the container is damaged, leaking or obsolete, contact Drexel 
Chemical Company at (901) 774-4370. If not returned to the point of 
purchase or to a designated location, triple rinse emptied container 
and offer for recycling. Disposal of this container must be in 
compliance with state and local regulations.

ME-TOO-LACHLOR IV 
555SP-0321asteriskPending.indd 11 3/29/2021 1:53:22 PM
PAGE 8 of 9
CONDITIONS OF SALE AND WARRANTY
Read the entire Directions for Use, Conditions, Disclaimer of 
Warranties and Limitations of Liability before using this product. If 
terms are not acceptable, return the unopened product container at 
once. By using this product, user or buyer accepts the following 
Conditions, Disclaimer of Warranties and Limitations of Liability. OUR 
RECOMMENDATIONS FOR USE of this product are based upon 
tests believed reliable. Follow directions carefully. Timing and method 
of application, weather and crop conditions, mixtures with other 
chemicals not specifically recommended and other influencing factors 
in the use of this product are beyond the control of the Seller. Buyer 
assumes all risks of use, storage and handling of this material not in 
strict accordance with directions given herewith.
In no case shall the Manufacturer or the Seller be liable for 
consequential, special or indirect damages resulting from the use or 
KDQGOLQJRIWKLVSURGXFWZKHQVXFKXVHDQG௘௘RUKDndling is not in strict 
accordance with directions given herewith. The foregoing is a 
condition of sale by the Seller and is accepted as such by the Buyer. 
ME-TOO-LACHLOR and the DREXEL logo are either trademarks or registered 
trademarks of Drexel Chemical Company. All other product names, brand 
names or trademarks belong to their respective holders.

555SP-0321asteriskPending.indd 13 3/29/2021 1:53:22 PM
APPENDICES
APPENDIX A: COMPATIBILITY TEST
Since liquid fertilizers can vary, even within the same analysis, always 
check compatibility with herbicide(s) each time before use . Be 
especially careful when using complete suspension or fluid 
fertilizers, as serious compatibility problems are more likely to occur. 
Commercial application equipment may improve compatibility in 
some instances. The following test assumes a spray volume of 25 
gallons per acre. For other spray volumes, make appropriate 
changes in the ingredients. Check compatibility using this procedure:
1. Add 1 pint of fertilizer to each of 2 one-quart jars with tight lids.
2. To one of the jars, add one-quarter teaspoon or 1.2 milliliters of a 
compatibility agent approved for this use, such as Compex or 
Unite (one-quarter tsp. is equivalent to 2 pWV௘௘JDOV
spray). Shake or stir gently to mix.
3. To both jars, add the appropriate amount of herbicide(s). If more 
than one herbicide is used, add them separately with dry 
herbicides first, flowables next, and emulsifiable concentrates 
last. After each addition, shake or stir gently to thoroughly mix. 
The appropriate amount of herbicides for this test follows:
Dry herbicides:For each pound to be applied per acre, add 1.5 level 
teaspoons to each jar.
Liquid herbicides: For each pint to be applied per acre, add one-
half teaspoon or 2.5 milliliters to each jar.
Note: For this product in tank-mixtures with Atrazine + Simazine, use 
one-third to one-half the amount of Atrazine specified above and 
the remainder as Simazine, depending on whether the 1:2 or 1:1 
ratio of Atrazine to Simazine is to be applied.
4. After adding all ingredients, put lids on and tighten, and invert 
each jar 10 times to mix. Let the mixtures stand 15 minutes and 
then look for separation, large flakes, precipitates, gels, heavy oily 
film on the jar, or other signs of incompatibility. Determine if the 
compatibility agent is needed in the spray mixture by comparing 
the 2 jars. If either mixture separates, but can be remixed readily, 
the mixture can be sprayed as long as good agitation is used. If 
the mixtures are incompatible, test the following methods of 
improving compatibility: (A) slurry the dry herbicide(s) in water 
before addition, or (B) add one-half of the compatibility agent to 
the fertilizer and the other one-half to the emulsifiable concentrate 
or flowable herbicide before addition to the mixture. If 
incompatibility is still observed, do not use the mixture.
APPENDIX B: LOW CARRIER APPLICATION For Broadcast 
Ground Application Only
Use sprayers, such as Ag-Chem RoGator
®, Hagie, John Deere Hi-
Cycle™, Melroe Spra-Coupe, Tyler Patriot™, or Willmar Air Ride ®,
that provide accurate and uniform application. Only water may be 
used as a carrier. Screens in suction and in-line strainers should be 
50 mesh. Manufacturers may require that tip screens as fine as 100 
mesh be used with some nozzles. Use a pump with capacity to: (1) 
maintain up to 35 to 40 psi at the nozzles, and (2) provide sufficient 
agitation in tank to keep mixture in suspension. Use a minimum of 5
gallons of spray mixture per acre. Maximum recommended sprayer 
speed is 15 mph. Rinse sprayer thoroughly with clean water 
immediately after each use. 
Note: Low pressure nozzles are recommended to reduce drift and 
increase application accuracy. Care should be taken when using 
automatic rate controlling devices to spray the material within the 
rated working pressure and flow ranges of the nozzles selected. 
Nozzle screens should be used when recommended by the 
manufacturer. All nozzles should be placed on 20 inch centers, except 
flooding types which should be placed on 40 inch centers. When flat 
fan-type nozzles are used, angles of 80° or 110° are recommended. 
Always read and follow the manufacturer’s directions for optimum 
setup and performance of their nozzles or tips.
APPENDIX C: AERIAL APPLICATION
Apply this product in water alone or in tank-mixtures with Atrazine, or 
Linuron in a minimum total volume of 2 gallons per acre by aircraft. 
This product may also be applied by air in combination with Prowl. 
Avoid application under conditions where uniform coverage cannot 
be obtained or where excessive spray drift may occur. To assure that 
spray will not adversely affect adjacent sensitive non-target plants, 
apply this product alone or this product + Atrazine by aircraft at a 
minimum upwind distance of 400 feet from sensitive plants, or apply 
this product + Linuron at a minimum upwind distance of 300 feet from 
sensitive plants. Avoid application to humans or animals. Flagmen 
and loaders should avoid inhalation of spray mist and prolonged 
contact with skin.
MANDATORY SPRAY DRIFT MANAGEMENT
GROUND BOOM APPLICATIONS:
• User must only apply with the release height recommended by the 
manufacturer, but no more than 4 feet above the ground or crop 
canopy.
• Applicators are required to select the nozzles and pressure that 
deliver medium or coarser droplets (ASABE S572).
• Do not apply when wind speeds exceed 15 miles per hour at the 
application site.
• Do not apply during temperature inversions.
BOOMLESS GROUND APPLICATIONS:
• Applicators are required to select the nozzle and pressure tha
t 
deliver medium or coarser droplet size (ASABE S572.3) for all 
applications.
• Do not apply when wind speeds exceed 15 miles per hour at the 
application site.
• Do not apply during temperature inversions.
AERIAL APPLICATIONS:
• Do not release spray at a height greater than 10 feet above the 
ground or vegetative canopy, unless a greater application height is 
necessary for pilot safety.
• Applicators are required to select the nozzle and pressure tha t 
deliver medium or coarser droplets (ASABE S641).
• If the wind speed is 10 miles per hour or less, applicators must use 
one-half swath displacement upwind at the downwind edge of the 
field. When the wind speed is between 11 to 15 miles per hour, 
applicators must use three-fourths swath displacement upwind at 
the downwind edge of the field.
• Do not apply when wind speeds exceed 15 miles per hour 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 aircraf
t 
and 75% or less of the rotor diameter for helicopters. Otherwise, 
the boom length must be 75% or less of the wingspan for fixedwing 
aircraft and 90% or less of the rotor diameter for helicopters.
• Do not apply during temperature inversions.
SPRAY DRIFT ADVISORIES
THE APPLICATOR IS RESPONSIBLE FOR AVOIDING OFF-SITE
SPRAY DRIFT.
BE AWARE OF NEARBY NON-TARGET SITES AND 
ENVIRONMENTAL CONDITIONS.
IMPORTANCE OF DROPLET SIZE
An effective way to reduce spray drift is to apply large droplets. Use 
the largest droplets that provide target pest control. While applying 
larger droplets will reduce spray dr ift, the pote ntial for drift will be 
greater if applications are made improperly or under unfavorable 
environmental conditions.
Controlling Droplet Size – Ground Boom 
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. Pressure - Use the 
lowest spray pressure recommended for the nozzle to produce the 
target spray volume and droplet size. Spray Nozzle - Use a spray 
nozzle that is designed for the intended application. Consider using 
nozzles designed to reduce drift.
Controlling Droplet Size – Aircraft 
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.
BOOM HEIGHT – Ground Boom 
For ground equipment, the boom should remain level with the crop 
and have minimal bounce.
ME-TOO-LACHLOR IV PAGE 10 of 9
RELEASE HEIGHT - Aircraft 
Higher release heights increase the potential for spray drift.
SHIELDED SPRAYERS
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.
TEMPERATURE AND HUMIDITY
When making applications in hot and dry conditions, use larger 
droplets to reduce effects of evaporation.

555SP-0321asteriskPending.indd 14 3/29/2021 1:53:22 PM
TEMPERATURE INVERSIONS
Drift potential is high during a temperature inversion. Temperature 
inversions are characterized by increasing temperature with altitude 
and are common on nights with limited cloud cover and light to no 
wind. 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. 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. 
Avoid applications during temperature inversions.
WIND
Drift potential generally increases with wind speed. AVOID 
APPLICATIONS DURING GUSTY WIND CONDITIONS.
Applicators need to be familiar with local wind patterns and terrain 
that could affect spray drift.
BOOMLESS GROUND APPLICATIONS
Setting nozzles at the lowest effective height will help to reduce the 
potential for spray drift.
HANDHELD TECHNOLOGY APPLICATIONS
Take precautions to minimize spray drift.
APPENDIX D: CENTER PIVOT IRRIGATION APPLICATION
This product alone in tank-mixture with other herbicides on this label, 
which are registered for center pivot application, may be applied in 
irrigation water pre-emergence (after planting, but before weeds or 
crop emerge) at rates recommended on this label. This product also 
may be applied post-emergence to the Field corn crop or Popcorn 
crop and pre-emergence to weeds in Field corn or Popcorn where 
post-emergence applications are allowed on this label. Follow all 
restrictions (height, timing, rate, etc.) to avoid illegal residues. Apply 
this product only through a center pivot irrigation system. Do not apply 
this product through any other type of irrigation system. Crop injury, 
lack of effectiveness, or illegal pesticide residues in the crop can 
result from non-uniform distribution of treated water. If you have 
questions about calibration, you should contact State Extension 
specialists, equipment manufacturers, or other experts. 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. 
A person knowledgeable of the chemigation system and responsible 
for its operation, or under the supervision of the responsible person, 
shall shut down the system and make the necessary adjustments 
should the need arise.
Operating Instructions
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 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.
8. Prepare a mixture with a minimum of 1 part of water to 1 part 
herbicide(s) and inject this mixture into the center pivot system. 
Injecting a larger volume of more dilute mixture per hour will 
usually provide more accurate calibration of metering equipment. 
Maintain sufficient agitation to keep the herbicide in suspension.
9. Meter into irrigation water during entire period of water 
application.
10.Apply in one-half to 1 inch of water. Use the lower water volume 
(one-half inch) on Coarse-textured 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. Use Precautions: for center 
pivot applications: Where sprinkler distribution patterns do not 
overlap sufficiently, unacceptable weed control may result. 
Where sprinkler distribution patterns overlap excessively, crop 
injury may result.
APPENDIX E: DRY BULK GRANULAR FERTILIZERS
Many dry bulk granular fertilizers may be impregnated or coated with 
this product alone or selected tank-mixtures of this product which are 
registered for pre-plant incorporated or pre-plant surface application 
which are used to control weeds in crops on this product label and 
are not prohibited from use on dry bulk granular fertilizers.
When applying this product or this product mixtures with dry bulk 
granular fertilizers, follow all directions for use and use precautions 
on the respective product labels regarding Field corn and Popcorn, 
rates per acre, soil texture, application methods (including timing of 
application), and rotational crops. All individual state regulations 
relating to dry bulk granular fertilizer blending, registration, labeling, 
DQG DSSOLFDWLRQ DUH WKH UHVSRQVLELOLW\ RI WKH LQGLYLGXDO DQG௘௘RU
FRPSDQ\VHOOLQJWKHKHUELFLGH௘௘IHUWLOizer mixture.
3UHSDUH WKH KHUELFLGH௘௘IHUWLOL]HU PL[WXUHV E\ XVLQJ DQ\ FORVHGG U X P  
belt, ribbon, or other commonly used dry bulk fertilizer blender. 
Nozzles used to spray this product and this product mixtures onto the 
fertilizer must be placed to provide uniform spray coverage. Care 
should be taken to aim the spray directly onto the fertilizer only and to 
avoid spraying the walls of the blender.
,I WKH KHUELFLGH௘௘IHUWLOL]HU PL[WXUH LVWRR ZHW DGG D KLJKO\DEVRUSWLYH
material, such as Agsorb® or Celatom MP-79®, or similar granular clay 
or diatomaceous earth materials, to obtain a dry, freeflowing mixture. 
Absorptive materials should be added only after the herbicide has 
been thoroughly blended into the fertilizer mixture. Best application 
results will be obtained by using a granule of six-thirtieth particle size 
or of a size similar to that of the fertilizer material being used. 
Generally, less than 2% by weight of absorptive material will be 
needed. Avoid using more than 5% absorptive material by weight.
Calculate amounts of this product, Atrazine, Atrazine + Simazine or 
Simazine by the following formula:
 2,000 SWV௘௘$RIOLTXLGpints of liquid or 
lbs. of fertilizer per acre x or flowable = flowable product per 
product ton of fertilizer
 2,000 OEV௘௘$RIGU\pounds of dry product 
lbs. of fertilizer per acre x product = per ton of fertilizer
Pneumatic (Compressed Air) Application (This Product Alone):
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. To minimize 
buildup, premix this product with Exxon Aromatic 200 at a rate of 1 to 
4 pints per gallon of this product. Aromatic 200 is a 
noncoPEXVWLEOH௘௘QRQIODPPDEOHSHWUROHXPSURGXFW$URPDWLFPD\
be used in either a fertilizer blender or through direct injection 
systems. Drying agents should not be used when using Aromatic 200.
ME-TOO-LACHLOR IV PAGE 11 of 9
Notes: (1) Mixtures of this product and Aromatic 200 must be used 
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. (2) When impregnating this product in a blender before 
application, a drier mixture can be attained by substituting a drying 
agent for Aromatic 200. The use of Agsorb FG or drying agents of

555SP-0321asteriskPending.indd 15 3/29/2021 1:53:22 PM
six-thirtieth particle size are recommended. (3) Drying agents are not 
recommended for use with the On-The-Go impregnation equipment.
Use Precautions: To avoid potential for explosion, (1) Do not 
impregnate this product or this product mixtures on ammonium 
nitrate, potassium nitrate, or sodium nitrate, either alone or in blends 
with other fertilizers. (2) Do not use this product or this product 
mixtures on straight limestone, since absorption will not be achieved. 
Fertilizer blends containing limestone can be impregnated.
Application
$SSO\WRSRXQGVRIWKHKHUELFLGH௘௘IHUWLOL]Hr mixture per acre. 
For best results, apply the mixture uniformly to the soil with properly 
calibrated equipment immediately after blending. Uniform application 
RIWKHKHUELFLGH௘௘௘௘IHUWLOL]HUPL[WXUHLVHVVHQWLDOWRSUHYHQWSRVVLEOHFURS
injury. 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. 
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 
SODQWLQJWRDOORZPRLVWXUHWRPRYHWKHKHUELFLGH௘௘IHUWLOL]HUPL[WXUHLQWR
the soil. On Coarse-textured soils, make applications approximately 
14 days prior to planting.
Use Precaution: To avoid crop injury, do not user the 
KHUELFLGH௘௘IHUWLOL]HUPL[WXUHRQ)LHOGFRUQDQG3RSFRUQZKHUHEHGGLQJ
occurs.
ME-TOO-LACHLOR and the DREXEL logo are either trademarks or registered trademarks 
of Drexel Chemical Company. All other pr oduct names, brand names or trademarks belong 
to their respective holders.