crop-chem-docs/corpus/epa_ppls/100-1142.md

# MESOTRIONE/ACETOCHLOR 3.5 CS

- EPA Reg No: **100-1142**
- Registrant: SYNGENTA CROP PROTECTION, LLC
- Signal word: Caution
- Active ingredients: Acetochlor (35%); Mesotrione (3.1%)
- Label accepted: 2004-11-03
- Source PDF: https://www3.epa.gov/pesticides/chem_search/ppls/000100-01142-20041103.pdf

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100 114l I( lB IZ001 
UNITED STATES ENVIRONMENTAL PROTECTION AGENCY 
WASHINGTON, D.C. 20460 
NOV - 3 2004 
Mr. Dan Campbell 
Syngenta crop Protection, Inc. 
P. O. Box 18300 
Greensboro, NC 27419 
Dear Mr. Campbell: 
OFFICE OF 
PREVENTION, PESTICIDES 
AND TOXIC SUBSTANCES 
; Subject: Mesotrione/Acetochlor 3.5 CS (Add Yellow Popular and Other Changes) 
) 
EPA Registration No. 100-1142 
Application Dated August 20,2004 
The labeling referred to above, submitted in connection with registration under the Federal 
Insecticide, Fungicide, and Rodenticide Act as amended is acceptable, provided you release the 
product for shipment. 
I. At the beginning of the list of Personal Protective Equipment (PPE) within the Precautionary 
Statements, add the statements "Some of the materials that are chemical-resistant to this product 
are listed below. If your want more options, follow the instructions for category A on an EPA 
chemical-resistance category selection chart. 
2. Incorporate the following bulk container language into your Storage and Disposal section. 
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 an alternate location designated by the 
registrant at the time of purchase of this product. If not returned to the point of purchase or to a 
designated location, triple rinse or pressure rinse the empty container and offer for recycling if 
available. 
Instructions for Users and Refillers 
The container must only be refilled with this pesticide product. Do not Reuse the Container for 
Any other Purpose. Do not transport if this container is damaged or leaking if the container is 
damaged, leaking, or obsolete, or to obtain information about recycling refillable containers, 
contact (insert company name) at (insert phone number). Cleaning is not necessary prior to 
refilling with the same product. Clean container before final disposal. Disposal of this container 
must be in compliance with state and local regulations.

, 
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-2-
Instructions for Refillers 
Prior to refilling, inspect carefully for damage such as cracks, punctures, abrasions, worn-out 
threads and closure devices. Check for leaks after refilling and before transporting. If the 
container can not be refilled, triple rinse or pressure rinse the empty container and offer for 
recycling if available. 
Submit two (2) copies of your final printed labeling incorporating the above changes before you 
release the product for shipment. Amended labeling supercedes all previously accepted ones. A 
stamped copy of labeling is enclosed for your records. 
Sincerely, 
vuk. jL uJ .~> d<-J 
James A. Tompkins 
Product Manager 25 
Herbicide Branch 
Registration Division (7505C)

RESTRICTED USE PESTICIDE 
Due to Oncogenicity 
For retail sale to and use only by Certified Applicators, or persons under their direct 
supervision, and only for those uses covered by the Certified Applicator's certification. 
This nroduct is a restricted use herbicide due to oncooenicitv concerns. 
Mesotrione/Acetochlor 3.5 CS 
Selective Herbicide 
A Preemergence Herbicide for Control of Annual Grass and Broadleaf Weeds in Field 
Corn, Production Seed Corn, and Silage Corn 
Active Ingredients: 
Acetochlor: 2-chloro-2'-methyl-6'-ethyl-N-ethoxymethylacetanilide ........................ 35.0% 
Mesotrjone: 2-[4-(methysulfonyl)-2-nitrobenzoylJ-1.3-cvclohexanedione .................. 3.1 % 
Other Ingredients: 61.9% 
Total: 100.0% 
Contains 3.29 pounds acetochlor and 0.29 pounds mesotrione active ingredient per 
gallon. 
KEEP OUT OF REACH OF CHILDREN 
CAUTION 
See additional precautionary statements and directions for use inside booklet 
EPA Reg. No. 100-1142 
EPA Est. 
SCP 1142 MAS 
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Net Contents 
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2 
FIRST AID 
If inhaled • Move person to fresh air. 
• If person is not breathing, call 911 or an ambulance, then give 
artificial respiration, preferably by mouth-ta-mouth, if possible. 
• Call a ooison control center or doctor for further treatment advice. 
If on skin or • Take off contaminated clothing. 
clothing • Rinse skin immediately with plenty of water for 15-20 minutes. 
• Call a ooison control center or doctor for treatment advice. 
If in eyes • Hold eye open and rinse slowly and gently with water for 15-20 
minutes. 
• Remove contact lenses, if present, after the first 5 minutes, then 
continue rinsing eye. 
• Call a ooison control center or doctor for treatment advice 
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 the poison control 
center or doctor. 
• Do not aive anvthina bv mouth to an unconscious oerson. 
Have the product container or label with you when calling a poison control center or 
doctor or aoina for treatment. 
HOT LINE 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 
HAZARDS TO HUMANS AND DOMESTIC ANIMALS 
CAUTION 
Harmful if absorbed through skin. Prolonged or frequently repeated skin contact may 
cause allergic reactions in some individuals. Avoid contact with skin, eyes, or clothing. 
'. ,-",..

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Personal Protective Equipment 
Applicators and other handlers must wear: 
• Long-sleeved shirt and long pants 
• Chemical resistant gloves. - Category A (e.g., barrier laminate, butyl rubber, nitrile 
rubber, neoprene rubber, natural rubber, polyethylene, polyvinyl chloride (PVC) or 
viton) 
• Shoes plus socks 
Discard clothing and other absorbent materials that have been drenched or heavily 
contaminated with this product's concentrate. Do not reuse them. Follow 
manufacturer's instructions for cleaning/maintaining PPE. If no such instructions for 
washables, use detergent and hot water. Keep and wash PPE separately from other 
laundry. 
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. 
User Safety Recommendations 
Users should: 
• Wash hands before eating, drinking, chewing gum, using tobacco or using the 
toilet. 
• Remove clothing immediately if pesticide gets inside. Then wash thoroughly and 
put on clean clothing. 
• Remove PPE immediately after handling this product. Wash the outside of 
gloves before removing. As soon as possible, wash thoroughly and change into 
clean clothino. 
Environmental Hazards 
Acetochlor is toxic to fish. Do not apply directly to water, or to areas where surface 
water is present or to intertidal areas below the mean high water mark. Do not 
contaminate water when cleaning equipment or disposing of eqUipment washwaters. 
Acetochlor demonstrates the properties and characteristics associated with chemicals 
detected in groundwater. The use of this chemical in areas where soils are permeable, 
particularly where the groundwater is shallow may result in groundwater contamination. 
Groundwater contamination may be reduced by diking and flooring of permanent liquid 
bulk storage sites with an impermeable material. . 
Surface Water Advisory 
Acetochlor has properties that may result in surface water contamination via dissolved

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runoff arid runoff erosion. Practices should be followed to minimize the potential for 
dissolved runoff and/or runoff erosion. 
This product may contaminate water through drift of spray in the wind. This product has 
high potential for runoff several weeks after application. Poorly drained soils and soils 
with shallow water tables are more prone to produce runoff that contains this product. 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 for contamination of water from runoff. Runoff of this product will be reduced 
by avoiding applications when rainfall is forecasted to occur within 48 hours. Sound 
erosion control practices will reduce this product's contribution to surface water 
contamination. 
Physical and Chemical Hazards 
Do not use or store near heat or open flame.

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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 should 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, Inc. or Seller. All such risks shall be assumed by 
Buyer and User, and 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. This warranty does not extend to the use of the product contrarY to 
label instructions, or under abnormal conditions or under conditions not reasonably 
foreseeable to or beyond the control of Seller or SYNGENTA, and Buyer and User 
"assume the risk of any such use. SYNGENTA MAKES NO WARRANTIES OF 
MERCHANTABILITY OR OF FITNESS FOR A PARTICULAR PURPOSE NOR ANY 
OTHER EXPRESS OR IMPLIED WARRANTY EXCEPT AS STATED ABOVE. 
In no event shall SYNGENTA or Seller be liable for any incidental, consequential or 
special damages resulting from the use or handling of this product. 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 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.

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DIRECTIONS FOR USE 
Restricted Use Pesticide 
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. 
AGRICUl rURAL 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. 
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 and 
water, wear: 
• coveralls over long-sleeved shirt and long pants, 
• socks and chemical resistant footwear, and 
• chemical-res.istant gloves - Category A (e.g. barrier laminate, butyl rubber, nitrile 
rubber, neoprene rubber, natural rubber, polyethylene, polyvinyl chloride (PVC) 
or viton).

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STORAGE AND DISPOSAL 
Do not contaminate water, food, or feed by storage or disposal. 
Pesticide Storage 
Keep container tightly closed when not in use. Do not store near seeds, fertilizers, or 
food stuffs. Keep away from heat and flame. Can be stored at temperatures as low as 
minus 30°F. 
Pesticide Disposal 
Opening dumping is prohibited. Wastes resulting from the use of this product may be 
disposed of on site or at an approved waste disposal facility. Rinse spray equipment. 
Pesticide wastes are acutely hazardous. Improper disposal of excess pesticide, spray 
mixture, or rinsate is a violation of Federal law. If these wastes cannot be disposed of 
by use according to label instructions, contact your State Pesticide or Environmental 
Control Agency, or the Hazardous Waste Representative at the nearest EPA Regional 
Office for guidance. 
Container Disposal 
Do not reuse empty container. Triple rinse (or equivalent) then offer for recycling or 
reconditioning, or puncture and dispose of in a sanitary landfill, or by incineration, or, if 
allowed by State and local authorities, by burning. If burned, stay out of smoke. 
For Bulk and Mini-Bulk Containers 
Container Disposal 
Reseal container and offer for reconditioning, or triple rinse (or equivalent) and offer for 
recycling or reconditioning, or clean in accordance with manufacturer's instructions. 
Container Precautions 
Before refilling, inspect thoroughly for damage such as cracks, punctures, bulges, 
dents, abrasions, and damaged or worn threads on closure devices. 
For Mini-Bulk Containers 
REFILL ONLY WITH Mesotrione/Acetochlor 3.5 CS selective herbicide. The contents 
of this container cannot be completely removed by cleaning. Refilling with materials 
other than Mesotrione/Acetochlor 3.5 CS will result in contamination and may weaken 
container. .

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After filling and before transporting, check for leaks. 
Do not refill or transport damaged or leaking container. 
Circulation before dispensing is required. 
CONTAINER IS NOT SAFE FOR FOOD, FEED, OR DRINKING WATERI 
USE RESTRICTIONS 
• Do not apply to the following soils if groundwater depth is 30 ft. or less: sand with 
less than 3% organic matter, loamy sand with less than 2% organic matter, or sandy 
loam with less than 1 % organic matter. 
• This product may not be mixed/loaded or used within 50 ft. of any wells, including 
abandoned wells, drainage wells, or sink holes, perennial or intermittent streams and 
rivers, and natural or impounded lakes and reservoirs. This setback does not apply 
to properly capped or plugged abandoned wells and ·does not apply to impervious 
pad or properly diked mixing/loading areas. 
• 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. 
Such a pad shall be designed and maintained to contain any product spills or 
equipment leaks, container or equipment rinse or washwater, and rainwater 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 pesticide shipments to the mixing/loading site: 
States may have in effect additional requirements regarding wellhead setbacks and 
operational containment. 
• Do not apply this product through any type of irrigation system. 
• Do not use flood irrigation to apply or incorporate this product. 
• Product must be used in a manner Which will prevent back siphoning in wells, spills 
or improper disposal of excess pesticide, spray mixtures or rinsates.

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9 
• 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: 
• Avoid treating powdery dry or light sandy soils when conditions are favorable for 
wind erosion. Under these conditions, the soil surface should first be settled by 
rainfall or irrigation. 
• Do not apply to impervious substrates such as paved or highly compacted 
surfaces or frozen or snow covered soils. 
• Do not use tailwater from the first flood or furrow irrigation of treated fields to treat 
non-target crops unless at least Y:z inch of rainfall has occurred between 
application and the first irrigation. 
• Do not apply this product using aerial application equipment. 
• Do not apply when wind conditions favor drift to non-target sites. To minimize spray 
drift to non-target areas: 
• Use low-pressure application equipment capable of producing a large droplet 
spray. 
• Do not use nozzles that produce a fine droplet spray. 
• Minimize drift by using sufficient spray volume to ensure adequate coverage with 
large droplet size sprays. 
• Keep ground-driven spray boom as low as possible above the target surface. 
• Make application when the wind velocity favors on-target product deposition 
(approximately 3-10 mph). Do not apply when wind velocity exceeds 15 mph. 
Avoid application when gusts approach 15 mph. . 
• Low humidity and high temperatures increase the likelihood of spray drift to sensitive 
areas. Avoid spraying during conditions of low humidity and/or high temperatures. 
Do not apply during inversion conditions. 
GENERAL USE PRECAUTIONS 
. Read all label directions before uSing. 
• This product is intended only for preemergence use in corn. 
• Do not use Mesotrione/Acetochlor 3.5 CS on any crop other than field corn, 
production seed corn, silage corn, or yellow popcorn. 
• Mesotrione/Acetochlor 3.5 CS should not be used on sweet corn, white popcorn, 
ornamental (Indian) corn, or corn seed stock such as Breeders, Foundation, or 
Increase.

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• Do not apply Mesotrione/Acetochlor 3.5 CS postemergence. 
• Do not contaminate irrigation water used for crops other than corn or water used for 
domestic purposes. 
• Do not apply Mesotrione/Acetochlor 3.5 CS before pre-irrigation in irrigated areas. 
• Avoid drift onto adjacent crops 
• Do not allow Mesotrione/Acetochlor 3.5 CS to contaminate feed or food. 
• Mesotrione/Acetochlor 3.5 CS should not be stored near seeds, fertilizers, or 
foodstuffs. 
• All containers of Mesotrione/Acetochlor 3.5 CS should be kept tightly closed when 
not in use. 
• Applied according to directions and under normal growing conditions, 
Mesotrione/Acetochlor 3.5 CS will not harm the treated crop. During germination 
and early stages of growth, extended periods of unusually cold and wet or hot and 
dry weather, insect or plant disease attack, carryover pesticide residues, the use of 
certain soil applied systemic insecticides, improperly placed fertilizers or soil 
insecticides may create abnormal conditions that weaken crop seedlings. 
Mesotrione/Acetochlor 3.5 CS used under these abnormal conditions could result in 
crop injury. 
• Do not tank mix Mesotrione/Acetochlor 3.5 CS with atrazine or atrazine containing 
products. 
• Do not apply other mesotrione containing products (e.g., Callisto®, Camix®, 
Lexar""', or LumaX®) to ground that has been treated with Mesotrione/Acetochlor 3.5 
CS in the same season. 
GENERAL INFORMATION 
For use only on field corn, production seed corn, silage corn, and yellow popcorn. Corn 
in this label refers to three types only: field corn, production seed corn, silage corn, and 
yellow popcorn. 
Mesotrione/Acetochlor 3.5 CS is a unique combination of the herbicides acetochlor and 
mesotrione plus the corn safener dichlormid. While the acetochlor and mesotrione 
provides weed control, the dichlormid safens corn against acetochlor injury. Acetochlor 
CS/Mesotrione 3.5 CS may be applied to the surface or incorporated into the top 1-2 
inch layer of soil. Acetochlor CSI Mesotrione 3.5CS will not control grasses which are

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emerged at the time of application. It is recommended for control alone, or in tank mix 
combinations as indicated, tor the weeds listed in the Table 4. 
Mesotrione/Acetochlor 3.5 CS controls weeds by interfering with normal germination 
and seedling development. Mesbtrione/Acetochlor 3.5 CS does not control established 
or germinated weeds present at application. 
Resistance Management 
Naturally occurring biotypes of certain broad leaf weed species with resistance to 
triazines or ALS herbicides are known to exist. However, no known resistance to this 
herbicide exists and there are no known instances of cross resistance between this 
herbicide and other classes of herbicides. If biotypes of weeds resistant to triazines or 
ALS inhibitors are present in the field, this herbicide should control them if they are 
listed in Table 4. 
To help reduce the risk of resistance development to this herbicide product, do not use 
other mesotrione containing herbicides (e.g., Callisto, Camix, Lexar, or Lumax) in the 
same season, on the same field, where Mesotrione/Acetochlor 3.5 CS has been 
applied. 
Integrated Pest (Weed) Management 
Mesotrione/Acetochlor 3.5 CS should be integrated into an overall weed and pest 
management strategy whenever the use of a herbicide is required. Practices known to 
reduce weed development (tillage, crop competition) and herbicide use (weed scouting, 
proper application timing, banding) should be followed wherever possible. Consult local 
agricultural and weed authorities for additionallPM strategies established for your area. 
Soil Texture and Organic Matter 
The soils are grouped into three classes: coarse, medium, and fine. Once the soil type 
has been determined, the texture group can be found in Table 1.

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Table 1. Soil Texture Groupings for Mesotrione/Acetochlor 3.5 CS Use Rate 
Selection 
-::: Medium Fine 
Sand Loam Siltv Clav Loam 
LoamvSand Silt Sandy Clav Loam 
Sandy Loam Silt Loam Siltv Clav 
Sandy Clav 
. ClavLoam 
Clav 
The soil texture and organic matter of the field on which the application is to be made 
must be determined prior to application. The use rate of Mesotrione/Acetochlor 3.5 CS 
is determined by a combination of these two factors. 
Use Rates in Conventional Tillage Systems 
The soil texture and organic matter level of the field on which Mesotrione/Acetochlor 3.5 
CS is to be applied should be determined prior to selecting the rate from Table 2. 
Table 2. Mesotrione/Acetochlor 3;5 CS Use Rates by Soil Texture and Organic 
Matter Content in Conventional Tillage Systems. Rates are in Quarts per Acre. 
Soil . . 
Snil TAVh.P4 I A .... t!; .. n liOJ.: aD/. nr-
Coarse 2.0-2.25 ats. 2.25-2.75 ats. 
Medium 2.0-2.75 ats. 2.5-3 ats. 
Fine 2.5-3.3 ots. 2.5-3.3 ots. 
These rates are for application within 14 days prior to planting. 
Organic Matter: If the organic matter content of the soil is at the lower end of the 
range, use the lower rates in the rate range given in Table 2. If the organic matter 
content is at the upper end of the range, use the higher rates given in the rate range. 
Weed Infestation: If the weed infestation is light, use a rate at the lower end of the rate 
range for the soil texture and organic matter content. If the weed infestation is heavier, 
use the higher rates in the rate range for the soil. 
Use Rates For Reduced and No-Till Systems 
Mesotrione/Acetochlor 3.5 CS may be used in reduced and no-till systems. The highest 
levels of control will be obtained wher:J applications are made as close to planting as 
possible. It is recommended that a burndown herbicide such as Gramoxone® Max,

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Touchdown®, Roundup®, or 2,4-0 be tank mixed with Mesotrione/Acetochlor 3.5 CS in 
reduced or no-till systems if weeds are present at application. 
Table 3.1 Mesotrione/Acetochlor 3.5 CS Use Rates by Soil Texture and 
Application Timing In Reduced and No-Till Systems. Rates are in Quarts per 
Acre. 
TimA of A )Dlication Relative to 'na 
Less than 10 Days At or After Planting 
Soil 10-14 Days Before Before or After But Before 
Tft_ .... ft Plantlna Plantlna Emeraence 
Coarse Do not apply more than 2.0-2.5qts. 2.0-2.5 qts. 
14 days before planting 
in coarse textured soils 
Medium 2.5ats. 2.5ats. 2.5 ats. 
Fine 2.5-3.3 ats. 2.5-3.3 ats. 2.5-3.3 ats. 
1 Rates are for single applications. Mesatrione/Acetochlor 3.5 CS may be split-applied. 
If the rate is split, apply 60% of the recommended rate up to 14 days before planting. 
The remaining 40% should be applied at or after planting. 
Weeds Controlled 
Mesotrione/Acetochlor 3.5 CS applied as directed in this label will control or suppress 
the weeds listed in Table 4. Additional weeds may be controlled with tank mixes. See 
the Mesotrlone/Acetochlor 3.5 CS Tank Mix Combinations section for recommended 
tank mix combinations. Always consult the tank mix product labels for specific rates 
and use directions. Always follow the most restrictive label when tank mixing 
Mesotrione/Acetochlor 3.5 CS with another product. You may tank mix 
Mesotrione/Acetochlor 3.5 CS with any other registered corn product (excluding 
atrazine) as long as compatibility is verified and it is not prohibited by the other product 
label.

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Table 4. Weeds Controlled or Partially Controlled by Mesotrione/Acetochlor 3.5 
CS at Recommended Use Rates 
C = Control 
Weed PC = Partial 
Co TVDe1 . Control 
Black niohtshade B Solanum niarum C 
Caroetweed B MoIluao verticillata C 
Cocklebur common B Xanthium strumarium PC 
Ragweed common B Ambrosia artemisiifolia C 
Raoweed Giant B Ambrosia trifida PC 
Florida ousley B Richardia scabra C 
Galinsoaa B Galinsoaa Darviflora C 
Hairv niohtshade B Solanum sarachoides C 
Kochia B Kochia scoDaria PC 
Jimsonweed B Datura stramonium C 
Lambsauarters common B ChenoDodium album C 
Morningglory, ivyleafl B Ipomoea hederacea PC 
entireleaf 
Palmer amaranth B Amaranthus Dalmeri C 
Pricklv sida B Sida soinosa C 
Purslane common B Portulaca o/eracea C 
Redroot oiaweed B Amaranthus retroflexus C 
Smartweed Pennsvlvania B Polv.aonum Densvlvanicum C 
Smartweed ladvsthumb B Polvaonum Dersicaria C 
Waterhemo. common B Amaranthus tuberculatus C 
Waterhemo. tall B Amaranthus rudis C 
Velvetleaf B Abutilon theoDhrasti C 
Barnvardorass G Echinochloa crus-aalli C 
Broadleaf sianalarass G Brachiaria o/atvDhvlla C3 
Browntoo oanicum G Panicum fasciculatum C 
Craborass G Diaitaria sPP. C 
Crowfootarass G Dactvloctenium aeavDtium C 
Fall panicum G Panicum dichotomiflorum C 
Field sand bur G Cenchrus incertus PC 
Foxtail millet G Setaria italica C 
Giant foxtail G Setaria faberi C 
. 
Goosegrass G Eleusine indica C 
Green foxtail G Setaria viridis C 
Prairie cuoarass G Eriochloa contracta C 
Red rice G Oma sativa C 
Red spranaletoo G Leotochloa filiformis C 
Robust foxtail (purple, G Setaria spp. C 
white)

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C = Control 
Weed PC = Partial .. TunAl ... I 
Seedlina iohnsonnrass G Somhum halenense PC 
Shattercane G Sorahum bicolor PC 
Southwestern cunnrass G Eriochloa aracilis C 
Texas nanicum G Panicum texanum C3 
Wild nroso millet G Panicum miliaceum PC 
Witcharass G Panicum canillare C 
Woollv cunnrass G Eriochloa villosa PC 
Yellow foxtail G Setaria alauca C 
Yellow nutsedae2 S Cvoerus esculentus C 
l B=Broadleaf, G=Grass, S=Sedge 
2Yellow nutsedge requires a minimum of 3Y:z qts. Incorporation will improve control. 
3Best control is achieved when Mesotrione/Acetochlor 3.5 CS is applied within 5 days of 
planting and rainfall occurs shortly after application or mechanical incorporation is used 
to activate the herbicide. If it does not rain within 7 days, shallow cultivation will 
enhance activity. Excessive rainfall after application may reduce control. Under 
adverse weather conditions and/or heavy infestations, a cultivation or follow-up 
herbicide may be needed. 
Rotational Crops 
Corn may be replanted immediately, if lost. Do not apply additional 
Mesotrione/Acetochlor 3.5 CS. 
Do not rotate to crops other than corn, soybeans, sorghum, wheat, or tobacco the year 
following application of Mesotrione/Acetochlor 3.5 CS. Wheat may be planted 4 months 
after application. If applied after June 1, do not rotate to crops other than corn or 
sorghum, the next season, or crop injury may occur. For all other crops, wait 18 
months. 
APPLICATION PROCEDURES 
In reduced or no-till systems, a burndown herbicide such as Gramoxone Max, Roundup, 
Touchdown, or 2,4-0 may be tank mixed with Mesotrione/Acetochlor 3.5 CS if emerged 
weeds are present at the time of application. 
Early Preplant: On medium and fine textured soils, Mesotrione/Acetochlor 3.5 CS may 
be applied up to 14 days prior to planting. 
Sprinkler Irrigation: Do not apply Mesotrione/Acetochlor 3.5 CS by sprinkler irrigation. 
Use a sprinkler system only to incorporate Mesotrione/Acetochlor 3.5 CS after 
171.2:7

16 
application. After Mesotrion.e/Acetochlor 3.5 CS has been applied, a sprinkler irrigation 
system set to deliver 11. -% in. of water per acre may be used to incorporate the product. 
Using more than % in. of water could result in reduced performance. On sandy soil low 
in organic matter, use no more than Yo in. of water. Do not use flood irrigation to apply or 
incorporate Mesotrione/Acetochlor 3.5 CS. 
Preemergence Surface: Mesotrione/Acetochlor 3.5 CS and certain tank mixes may be 
applied to the soil surface as a broadcast or banded application. Precipitation or 
sprinkler irrigation is necessary to bring Mesotrione/Acetochlor 3.5 CS into contact with 
germinating seeds. If rain or sprinkler irrigation does not occur within 7 days after 
application, weed control may be improved by using a rotary hoe, or similar device, to 
incorporate the herbicide. Do not remove Mesotrione/Acetochlor 3.5 CS from the weed 
control zone or dilute it with untreated soil. The device used should be run at a shallow 
depth to prevent disturbing the corn seed. 
Banding Preemergence: Mesotrione/Acetochlor 3.5 CS and certain tank mixtures may 
be applied in a 10-15 in. band after corn planting but prior to corn emergence. If rain or 
sprinkler irrigation does not occur within 7 days after application, weed control may be 
improved by using a rotary hoe or similar device to incorporate the herbicide. Do not 
remove Mesotrione/Acetochlor 3.5 CS from the weed control zone or dilute it with 
untreated soil. Do not disturb the germinating corn. 
Band Applications: For band applications, using row and band width measurements 
in inches, calculate the amount to be applied per acre as follows: 
Band width in inches 
Row width in inches 
Planting 
x Rate per acre for = Amount needed per acre 
a broadcast treatment 
Planting should be done as close to the time of application of Mesotrione/Acetochlor 3.5 
CS as possible. This allows Mesotrione/Acetochlor 3.5 CS to provide effective weed 
control during the time it is most critical in the production of corn. 
Cultivation 
Cultivation should be delayed as long as possible. Should weeds develop, a shallow 
cultivation or rotary hoeing will generally result in improved weed control. If 
Mesotrione/Acetochlor 3.5 CS was incorporated, cultivate less than half the depth of 
incorporation. 
If cultivation is necessary due to soil crusting, compaction or escaped weeds, adjust 
equipment to run sh.allow and minimize soil movement. This will decrease the 
possibility of diluting or moving the herbicide from the weed control zone.

17 
MIXING PROCEDURES 
Carrier 
Liquids: Either water or liquid fertilizers excluding suspension fertilizers may be used 
as carriers. If fluid fertilizers are used, a physical compatibility test must be done before 
combining in the spray tank. See Procedure for Testing the Compatibility of 
Mesotrione/Acetochlor 3.5 CS and Tank Mixes With Fluid Fertilizers section for 
details of the compatibility testing. procedure. Even if Mesotrione/Acetochlor 3.5 CS is 
physically compatible with a fluid fertilizer, constant agitation is necessary to maintain a 
uniform mixture during application. A longer agitation period may be required when 
using cold water from sources such as deep wells. 
Adding to Spray Tank 
The spray tank must be clean, thoroughly rinsed anddecontaniinated before adding 
either Mesotrione/Acetochlor 3.5 CS alone or with tank mix combinations. If water is . 
used as the carrier, use clean water. 
Used Alone: When Mesotrione/Acetochlor 3.5 CS is used alone, add the 
recommended amount to the spray tank when the tank is half filled, then add the rest of 
the water or fluid fertilizer. Provide sufficient agitation during mixing and application to 
maintain a uniform emulsion. 
Tank Mixed: Refer to the sections on this label for recommended tank mixes. Always 
refer to labels of the other pesticide products for mixing directions and precautions 
which may differ from those outlined here. Use in accordance with the most restrictive 
of label limitations and precautions. No label dosage rates should be exceeded. This 
product cannot be mixed with any product containing a label prohibition against such 
mixing. If a tank mixture is used, it is recommended that a compatibility test be done 
before actual tank mixing. See Procedure For Testing the Compatibility of 
Mesotrione/Acetochlor ~.5 CS and Tank Mixes With Fluid Fertilizers section for 
details on the procedure for such a test. 
Once compatibility is confirmed for the tank mix, fill the tank half full. Start and continue 
agitation throughout mixing. All return lines to the spray tank must discharge below the . 
liquid level. Add components in the following order of formulation: 
• If a wettable powder or dry flowable formulation is used, make a slurry with water 
and add it slowly through the screen into the tank. Agitate during the procedure. 
• If a flowable formulation is used, add slowly through screen into the tank. Mixing 
and compatibility may be improved when the flowable is diluted with water before 
adding to the tank. 
• Add Mesotrione/Acetochlor 3.5 CS next.

18 
• Add Gramoxone Max, Touchdown, Roundup, Warrior® and/or 2,4-0 and a nonionic 
surfactant last, if needed. 
• Complete filling the sprayer tank and continue agitation. 
• Batches should be m,ixed and applied the same day. 
Volume 
Liquid: Use a minimum water volume of 10 galsJA in broadcast boom equipment for 
ground applications. 
Pressure 
If liquid carriers are used, the pressure at the nozzle should be 15-40 psi to ensure good 
distribution in the spray pattern. Use appropriate nozzles and 50-mesh or coarser 
screens, if needed. Maintain agitation to ensure the mixture is suspended in the spray 
tank. 
Procedure For Testing the Compatibility of Mesotrione/Acetochlor 3.5 CS and 
Tank mixes with Fluid Fertilizers 
Since fluid fertilizers vary, the following procedure is suggested for determining whether 
Mesotrione/Acetochlor 3.5 CS may be combined with a specific fluid fertilizer for spray 
tank application. 
Materials Needed 
• Mesotrione/Acetochlor 3.5 CS and any tank mix products. 
• Fluid fertilizer to be used. 
• Adjuvant for fertilizer tank mix: Use any adjuvant cleared for use on growing crops 
under 40 CFR 180.1001 to improve the compatibility of Mesotrione/Acetochior 3.5 
CS with fluid fertilizers. The adjuvant which provides the best emulsification depends 
on the specific fertilizer under consideration. 
• Two 1 qt. wide-mouth jars with lid or stopper. 
• Measuring spoons (a 25 ml. pipette or graduated cylinder provides more accurate 
measurement). 
• Measuring cup, 8 ozs. (257 mI.).

19 
Procedure 
1. Pour a pint (about 473 mi.) of the fluid fertilizer into each of the quart jars. 
2. Add Mesotrione/Acetochlor 3.5 CS and any tank mix combination to the jars. 
The order of addition is wettable powders first with mixing, followed by flowables 
with mixing, and the EC's last. The rate of wettable powders and dry flowables is 
1 Yo tsp. per pound of product per acre to be applied. EC's should be added at 
the rate of Yo tsp. for each pint per acre to be applied. Premixing the wettable 
powders in 1 oz. of water before adding to the pint of fluid fertilizer will improve 
the compatibility of the final mixture. 
3. Add Yo tsp. (2 mI.) adjuvant to one of the jars, label it as "with", and mix. The rate 
of Yo tsp. per pI. is equal to 3 pts. of adjuvant per 100 gals. of fluid fertilizer. 
4. Close both jars with lids or stoppers and mix the contents by turning the jars 
upside down ten times. 
5. Inspect the surface and body of the mixtures: 
a) Immediately after completing the jar inversions. 
b) After allowing the jars to stand quietly for 30 minutes. 
c) And then again after turning the jars upside down 10 times after the 30 
minute inspection. 
Evaluation 
If either mixture remains uniform for 30 minutes, the combination may be used. Should 
either mixture separate after 30 minutes, but readily remix uniformly with 10 jar 
inversions, the mixture can be used if adequate agitation is maintained in the tank. If 
the mixture with adjuvant is satisfactory but the one without adjuvant is not, be sure to 
use the adjuvant in the spray tank. Add the adjuvant first at a rate of 3 pts.l100 gals. of 
fluid fertilizer. Foaming may be minimized by using moderate agitation. IF 
NON DISPERSIBLE OIL, SLUDGE, OR CLUMPS OF SOLIDS FORM IN THE 
MIXTURES, THE COMBINATION SHOULD NOT BE USED. 
CROP USE DIRECTIONS 
Mesotrione/Acetochlor 3.5 CS Tank Mix Combinations 
Use of Spray Adjuvants 
Mesotrione/Acetochlor 3.5 CS is a preemergence herbicide for which spray adjuvants 
have little or no influence on performance. However, several herbicides used in tank 
mixtures with Mesotrione/Acetochlor 3.5 CS require use of adjuvants to aid in the 
2(12.3

20 
burndown of emerged weeds. Use only those adjuvants to aid in the burndown of 
emerged weeds and approved for agricultural crop use. Surfactants and/or low rate 
fertilizer (28%. 30% or 32% UAN or ammonium sulfate) adjuvants may be used with 
tank mixes applied preplant or preemergence to the crop. 
Preemergence Tank Mix Combinations 
Tank mix combinations may be used in either conventional. reduced or no-till systems 
and be applied by the same methods and at the same timings as Mesotrione/Acetochlor 
3.5 CS unless otherwise specified in the tank mix product label. Three way tank 
mixtures are allowed if not restricted by the respective product labels. Check all tank 
mix product labels for proper rates for three way tank mixes. 
Conventional Tillage 
Tank Mix Exa ... Rate {Max.} 
LoroX® DF See label Enhanced lambsouarter and oioweed control 
Warrior 3.84 fl. oz.lA For control of many insects such as cutwonn 
Perform compatibility test and check the product label for directions and precautions. 
Reduced or No-Till Corn 
Tank Mix liAS RatA n •. A 
Banvel®lClaritv® See label Burndown existino weeds 
Gramoxone Max 2.7ots.lA Burndown existino weeds 
Rounduo brands See label Burndown existino weeds 
Touchdown brands See label Burndown existino weeds 
24 D See Label Burndown existina weeds 
Warrior 3.84 fl. oz.lA For control of manv insects slich as cutwonn 
Perform compatibility test and check the product label for directions and precautions. 
Mesotrione/Acetochlor 3.5 CS and Gramoxone Max, TOUChdown, Roundup, or 2,4-o . 
In reduced or no-till corn. Gramoxone Max. Touchdown. Roundup. and/or 2,4-D will 
burndown existing weeds. Gramoxone Max should be applied to emerged weeds when 
they are small. Weeds 1 to 6 inches in height are the easiest to control. Large weeds 
may be more difficult to control. Consult the Gramoxone Max. Touchdown. Roundup. or 
2,4-D product label for further infonnation on weeds controlled. 
Gramoxone Max is a RESTRICTED USE pesticide. Refer to the Gramoxone Max label 
for further directions. precautions. and limitations relative to its use.

21 
Callisto®, CamiX®, Gtamoxone® Max, Lexar™, LumaX®, Touchdown®, Warrior® and 
the Syngenta logo are trademarks of a Syngenta Group Company 
Banvel® and Clarity® trademarks of BASF Ag Products 
LoroX® OF is a trademark of E.I. duPont de Nemours & Co., Inc. 
Roundup® trademark of Monsanto Company 
©2004 Syngenta 
For non-emergency information (e.g., current product information), call 
Syngenta Crop Protection at 1-800-334-9481 
Syngenta Crop Protection, Inc. 
Greensboro, North Carolina 27409 
WWW syngeota-us porn 
SCP 1142 MAS 
MESO-ACETO 3.5CS 1142 CLEAN - pd - 08/19/04 
000100-01142.20040820.MESO·ACET0-1142-AMEND-0804.pdf