crop-chem-docs/corpus/epa_ppls/100-1568.md

# Acuron Flexi

- EPA Reg No: **100-1568**
- Registrant: SYNGENTA CROP PROTECTION, LLC
- Signal word: Caution
- Active ingredients: Bicyclopyrone (0.87%); S-Metolachlor (31.24%); Mesotrione (3.47%)
- Label accepted: 2023-01-24
- Source PDF: https://www3.epa.gov/pesticides/chem_search/ppls/000100-01568-20230124.pdf

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UNITED STATES ENVIRONMENTAL PROTECTION AGENCY 
 WASHINGTON, DC 20460 
 
 
 
OFFICE OF CHEMICAL SAFETY 
AND POLLUTION PREVENTION 
 
January 24, 2023 
 
Rachel Hardie 
Regulatory Product Manager, Herbicides 
Syngenta Crop Protection, LLC 
P. O. Box 18300 
Greensboro, NC 27419 
 
Subject: Registration Review Label Amendments Incorporating Mitigation Measures from 
the Interim Decisions for S-Metolachlor and Mesotrione and the National Marine 
Fisheries Services’ (NMFS) Biological Opinion on the Effects of S-Metolachlor 
on Pacific Salmonids 
 Product Name: Acuron Flexi 
 EPA Registration Number: 100-1568 
 Application Dates: 6/11/2021, 9/3/2021 and 3/29/2022 
Decision Numbers: 576419, 578265 and 582923 
 
Dear Rachel Hardie: 
 
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 S-Metolachlor and Mesotrione Interim Decisions. The Agency has concluded that your 
submission is acceptable. 
 
This letter also addresses the label mitigation resulting from the NMFS’ Biological Opinion on 
the effects of S-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. 100-1568 
Decision No. 576419, 578265 and 582923 
 
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 Anna Senninger at 
senninger.anna@epa.gov. 
 
 Sincerely, 
 
 
 Linda Arrington, Branch Chief 
 Risk Management and Implementation Branch 4 
 Pesticide Re-Evaluation Division 
 Office of Pesticide Programs 
 
 
 
Enclosure

1
Sale, use and distribution of this product in Nassau and Suffolk Counties in the 
State of New York is prohibited.
BICYCLOPYRONE GROUP 27 HERBICIDE
MESOTRIONE GROUP 27 HERBICIDE
S-METOLACHLOR GROUP 15 HERBICIDE
Acuron™ Flexi
Selective Herbicide
A Preemergence and Postemergence Herbicide for Control of Annual Grass and 
Broadleaf Weeds in Field Corn, Seed Corn, Silage Corn, Sweet Corn and Yellow 
Popcorn
Active Ingredients*:
Bicyclopyrone: (CAS No. 352010-68-5) ................................................................. 0.87%
Mesotrione: (CAS No. 104206-82-8) ..................................................................... 3.47%
S-metolachlor: (CAS No. 87392-12-9).................................................................. 31.24%
Other Ingredients 64.42%
Total: 100.00%
*Active ingredients per gallon: Bicyclopyrone 0.08 pounds, Mesotrione 0.32 pounds
and S-metolachlor 2.86 pounds.
KEEP OUT OF REACH OF CHILDREN
CAUTION
See additional precautionary statements and directions for use inside booklet.
EPA Reg. No. 100-1568
EPA Est.
2.5 gallons
220 gallons
___ gallons [bulk]
Net Contents
Jan 24, 2023
100-1568

2 
 
 
FIRST AID 
If in eyes x Hold eye open and rinse slowly and gently with water for 15-20 
minutes. 
x Remove contact lenses, if present, after the first 5 minutes, then 
continue rinsing eye. 
x Call a poison control center or doctor for treatment advice 
If swallowed x Call a poison control center or doctor immediately for treatment 
advice. 
x Have person sip a glass of water if able to swallow. 
x Do not induce vomiting unless told to do so by the poison control 
center or doctor. 
x Do not give anything by mouth to an unconscious person. 
If on skin or 
clothing 
x Take off contaminated clothing. 
x Rinse skin immediately with plenty of water for 15-20 minutes. 
x Call a poison control center or doctor for treatment advice. 
If inhaled x Move person to fresh air. 
x If person is not breathing, call 911 or an ambulance, then give 
artificial respiration, preferably by mouth-to-mouth, if possible. 
x Call a poison control center or doctor for further treatment advice. 
Have the product container or label with you when calling a poison control center or 
doctor or going for treatment. 
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 
 
Causes moderate eye irritation. Prolonged or frequently repeated skin contact may 
cause allergic reactions in some individuals. Avoid contact with eyes or clothing. Wear 
protective eyewear. Wash thoroughly with soap and water after handling and before 
eating, drinking, chewing gum, using tobacco or using the toilet. 
 
Personal Protective Equipment (PPE) 
 
Some materials that are chemical resistant to this product are listed below.

3 
 
Mixers, Loaders, Applicators and other handlers must wear: 
 
x Protective eyewear 
x Long-sleeved shirt and long pants 
x Chemical-resistant gloves (made of barrier laminate, butyl rubber >14 mils, nitrile 
rubber >14 mils, neoprene rubber >14 mils, natural rubber >14 mils, 
polyethylene, polyvinyl chloride (PVC) >14 mils, or Viton® >14 mils) 
x Shoes plus socks 
 
See engineering controls for additional requirements. 
 
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. 
 
Engineering Control Statements 
 
When handlers use closed systems or enclosed cabs, 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:
 
x Wash hands before eating, drinking, c hewing gum, using tobacco, or using the 
toilet. 
x Remove clothing/PPE immediately if pesticide gets inside. Then wash thoroughly 
and put on clean clothing. 
x Remove PPE immediately after handling this product. Wash the outside of gloves 
before removing. As soon as possible, wash thoroughly and change into clean 
clothing. 
 
Environmental Hazards 
 
Do not apply directly to water, to areas where surface water is present, or to intertidal 
areas below the mean high water mark. Do not contaminate water when disposing of 
equipment wash water or rinsate. 
 
Ground Water Advisory 
 
Bicyclopyrone, mesotrione and S-metolachlor are known to leach through soil into 
ground water under certain conditions as a result of label use. These chemicals may 
leach into ground water if used in areas where soils are permeable, particularly where 
the water table is shallow.

4 
 
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 ground water. This 
product is classified as having high potential for reaching surface water via runoff for 
several weeks or months after application. 
 
A level, well-maintained vegetative buffer strip between areas to which this product is 
applied and surface water features such as ponds, streams, and springs will reduce the 
potential loading of S-metolachlor and mesotrione from runoff water and sediment. 
Runoff of this product will be reduced by avoiding applications when rainfall or irrigation 
is expected to occur within 48 hours. 
 
Non-Target Organism Advisory 
 
This product is toxic to plants and may adversely impact the forage and habitat of non-
target organisms, including pollinators, in areas adjacent to the treated site. Protect the 
forage and habitat of non-target organisms by following label directions intended to 
minimize spray drift. 
 
Reporting Ecological Incidents 
 
To report ecological incidents, including mortality, injury, or harm to plants and animals, 
call 1-800-888-8372. 
 
Mixing/Loading Instructions 
 
Care must be taken when using this product to prevent back siphoning into wells, spills, 
or improper disposal of excess pesticide, spray mixtures, or rinsates. 
 
Check valves or antisiphoning devices must be used on mixing equipment. 
 
This product may not be mixed or loaded within 50 ft of perennial or intermittent streams 
and rivers, natural or impounded lakes, and reservoirs. This product may not be 
mixed/loaded or used within 50 ft 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 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 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

5 
 
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. 
 
Physical and Chemical Hazards 
 
Do not use or store near heat or open flame. Do not mix or allow contact with oxidizing 
agents. Hazardous chemical reaction may occur.

6 
 
 
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 produ
ct at once, unopened, and the purchase price will be 
refunded. 
 
Read and follow the Directions for Use of this product. It is impossible to eliminate all 
risks inherently associated with the use of this product. Crop injury, ineffectiveness or 
other unintended consequences may result because of such factors as manner of use 
or application, weather or crop conditions, presence of other materials or other 
influencing factors in the use of the product, which are beyond the control of 
SYNGENTA CROP PROTECTION, LLC or Seller. To the extent permitted by 
applicable law, Buyer and User agree to hold SYNGENTA and Seller harmless for any 
claims relating to such factors. 
 
SYNGENTA warrants that this product conforms to the chemical description on the label 
and is reasonably fit for the purposes stated in the Directions for Use, subject to the 
inherent risks referred to above, when used in accordance with directions under normal 
use conditions. To the extent permitted by applicable law: (1) this warranty does not 
extend to the use of the product contrary to label instructions or under conditions not 
reasonably foreseeable to or beyond the control of Seller or SYNGENTA, and (2) Buyer 
and User assume the risk of any such use. To the extent permitted by applicable law, 
SYNGENTA MAKES NO WARRANTIES OF MERCHANTABILITY OR OF FITNESS 
FOR A PARTICULAR PURPOSE NOR ANY OTHER EXPRESS OR IMPLIED 
WARRANTY EXCEPT AS WARRANTED BY THIS LABEL. 
 
To the extent permitted by applicable law, in no event shall SYNGENTA be liable for 
any incidental, consequential or special damages resulting from the use or handling of 
this product. TO THE EXTENT PERMITTED BY APPLICABLE LAW, THE 
EXCLUSIVE REMEDY OF THE USER OR BUYER, AND THE EXCLUSIVE LIABILITY 
OF SYNGENTA AND SELLER FOR ANY AND ALL CLAIMS, LOSSES, INJURIES 
OR DAMAGES (INCLUDING CLAIMS BASED ON BREACH OF WARRANTY, 
CONTRACT, NEGLIGENCE, TORT, STRICT LIABILITY OR OTHERWISE) 
RESULTING FROM THE USE OR HANDLING OF THIS PRODUCT, SHALL BE THE 
RETURN OF THE PURCHASE 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.

7 
 
 
DIRECTIONS FOR USE 
 
It is a violation of Federal law to use this product in a manner inconsistent with its 
labeling. 
 
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. 
 
 
Use Acuron Flexi in accordance with the use directions on this label or in separately 
published Syngenta supplemental labeling for this product. 
 
Do not apply this product in a way that will contact workers or other persons, either 
directly or through drift. Only protected handlers may be in the area during application. 
For any requirements specific to your State or Tribe, consult the agency responsible for 
pesticide regulation. 
 
 
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 instructio
ns 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 24 hours. 
 
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:
 
 
x Protective eyewear

8 
 
x Coveralls 
x Chemical-resistant gloves (made of barrier laminate, butyl rubber >14 mils, nitrile 
rubber >14 mils, neoprene rubber >14 mils, natural rubber >14 mils, 
polyethylene, polyvinyl chloride (PVC) >14 mils, or Viton >14 mils 
x Shoes and socks 
 
 
FAILURE TO FOLLOW THE DIRECTIONS FOR USE AND PRECAUTIONS ON THIS 
LABEL MAY RESULT IN POOR WEED CONTROL, CROP INJURY, OR ILLEGAL 
RESIDUES. 
 
Sale, use and distribution of this product in Nassau and Suffolk Counties in the 
State of New York is prohibited. 
 
PRODUCT INFORMATION 
 
Acuron Flexi is labeled for use in field corn, silage corn, seed corn, yellow popcorn, and 
sweet corn for control of many annual grass and broadleaf weeds. Acuron Flexi is a 
combination of the herbicides bicyclopyrone, mesotrione and S-metolachlor plus the 
safener benoxacor. 
 
Table 1. Acuron Flexi Application Methods 
 
Crop Acuron Flexi Application Method 
Field Corn Preplant1, Preemergence and Postemergence 
Silage Corn Preplant1, Preemergence and Postemergence 
Seed Corn Preplant1, Preemergence and Postemergence 
Yellow Popcorn Preplant and Preemergence 
Sweet Corn Preplant and Preemergence 
1Apply up to 28 days prior to planting 
 
See Tables 2 and 3 for a list of weeds controlled. Apply this product prior to weed 
emergence to effectively control most grass weeds. 
 
Applied according to use directions and under normal growing conditions, Acuron Flexi 
will not harm the treated crop. During germination and early stages of growth, 
environmental conditions or other factors that favor poor or slow growth can weaken 
crop seedlings. Acuron Flexi used under these conditions can result in crop injury. 
 
ACURON FLEXI USE PRECAUTIONS 
 
x Applied according to directions and under normal growing conditions, Acuron Flexi 
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

9 
 
insecticides, improperly placed fertilizers or soil insecticides may weaken crop 
seedlings. Acuron Flexi used under these conditions could result in crop injury. 
 
x 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. 
 
x Dry weather following preemergence application of Acuron Flexi applied alone or in 
tank mixture may reduce effectiveness. If possible, cultivate if weeds develop. 
 
x Applying Acuron Flexi postemergence to corn that has received an at-planting 
application of Counter® insecticide can result in severe corn injury. 
x Temporary corn injury may occur if Acuron Flexi is applied postemergence to corn 
that has received and at planting application of an organophosphate insecticides 
other than Counter. 
 
x Postemergence (emerged corn) applications of any organophosphate or carbamate 
insecticide within 7 days before or 7 days after an Acuron Flexi application may 
result in severe corn injury. 
 
ACURON FLEXI USE RESTRICTIONS 
 
x Do not apply this product throug h any type of irrigation system. 
 
x Do not apply Acuron Flexi postemergence in a tank mix with emulsifiable 
concentrate grass herbicide, unless specifically addressed under the tank-mix 
sections of this label. 
 
x Do not apply postemergence with suspension fertilizers as the carrier. 
 
x Do not feed or harvest forage or sweet co rn ears within 45 days after application. 
 
x Do not make more than 1 postemergence application and not more than 2 total 
applications of Acuron Flexi per year. Do not make the second application of Acuron 
Flexi within 14 days of the first application. 
 
x Do not apply more than 2.25 qt of Acuron Flexi per acre per year-(0.18 lb ai/A 
mesotrione, 1.61 lb ai/A s-metolachlor, and 0.045 lb ai/A bicyclopyrone). 
 
x Do not exceed label dosage rates, nor combined maximum annual rates for any of 
the active ingredients in Acuron Flexi. 
 
x Do not apply more than 0.045 lb of bicyclopyrone per acre of corn per year. 
 
x Do not apply more than 0.24 lb of mesotrione per acre of corn per year.

10 
 
x Do not apply more than 3.71 lb of S-metolachlor per acre of corn per year. 
 
x Do not harvest corn for forage, grain, or stover within 60 days after a postemergence 
application of Acuron Flexi. 
 
x Do not apply Acuron Flexi to corn that is greater than 30 inches tall or corn that is 
larger than the 8-leaf stage of growth. 
 
x Do not use aerial application to apply Acuron Flexi. 
 
x Do not apply Acuron Flexi to sweet corn or yellow popcorn after the crop has 
emerged. 
 
x Do not apply Acuron Flexi to white popcorn or ornamental (Indian) corn. 
 
x Do not use a sprayer or applicator contaminated with other materials, or crop 
damage or sprayer clogging of the application device may occur. Thoroughly clean 
sprayer or other application device before using. Dispose of cleaning solution in a 
responsible manner. 
 
x Read and observe all precautions and limitati ons on this label and the label of each 
product used in tank mixtures. 
 
x Do not make postemergence (emerged corn) applications of Acuron Flexi in a tank 
mix with any organophosphate or carbamate insecticide, or severe corn injury may 
occur. 
 
x Do not contaminate irrigati on water used for crops or water used for domestic 
purposes. 
 
x Do not apply under conditions which favor ru noff or wind erosion of soil containing 
this product to nontarget areas. To prevent off-site movement due to runoff or wind 
erosion: 
 
ƒ Avoid treating powdery dry or light sa nd soils when conditions are favorable for 
wind erosion. Under these conditions, the soil surface should first be settled by 
rainfall or irrigation. 
 
ƒ Do not apply to impervious substrates, such as paved or highly compacted 
surfaces. 
 
ƒ Do not use tail water from the first floo d or furrow irrigation of treated fields to 
treat nontarget crops, unless at least ½ inch of rainfall has occurred between 
application and the first irrigation.

11 
 
 
WEED RESISTANCE MANAGEMENT 
 
 
 
Naturally occurring biotypes of certain weed species with resistance to triazines, ALS, 
PPO, Glycine (glyphosate) and HPPD herbicides are known to exist. If biotypes of 
weeds resistant to triazines, ALS, PPO and glycine inhibitors are present in the field, 
this herbicide should control them if they are listed in Tables 2 and 3. 
 
To reduce the risk of weeds developing resistance to HPPD inhibitors, implement a 
program including both preemergence and/or postemergence herbicides that provides 
effective control of all weeds using multiple modes of action. This includes scouting 
fields before application to ensure the herbicide will be appropriate for the weeds 
present. Scout fields and eliminate weed escapes. If suspected weed resistance is 
observed against a particular weed species, contact your Syngenta or retailer 
representative or call Syngenta Customer Service (1-800-334-9481). Lack of weed 
control is not necessarily an indicator of weed resistance. 
 
Consider weed resistance management strategies that include two or more modes of 
action where a minimum of two modes of action are effective at controlling the target 
weed when either are applied alone. 
 
Read and follow all label directions. 
 
Acuron Flexi Herbicide contains three herbicide active ingredients and two modes of 
action and can be an effective component of a weed resistance management strategy. 
 
Acuron Flexi may be integrated into an overall weed and pest management strategy. 
Utilize practices known to reduce weed development (tillage, crop competition) and 
herbicide use (weed scouting, proper application timing, banding and rotations) 
wherever possible. Consult local agricultural and weed specialist for additional 
Integrated Pest Management strategies established for your area. 
 
Principles of Herbicide Weed Resistance Management 
Scout and know your field 
x Know weed species present in the field to be treated through scouting and field 
history. An understanding of weed biology is useful in designing a resistance 
management strategy. Ensure the weed management program will control all weeds 
present. 
x Fields should be scouted prior to application to determine species present and 
growth stage. Always apply this herbicide at the full labeled rate and correct timing 
for the weeds present in the field.

12 
 
Utilize non-herbicidal practices to add diversity 
x Use diversified management tactics such as cover crops, mechanical weed control, 
harvest weed seed control, and crop rotation as appropriate. 
Use good agronomic practices, start clean and stay clean 
x Use good agronomic practices that enhance crop competitiveness. 
x Plant into weed-free fields utilizing til lage or an effective burndown herbicide for 
control of emerged weeds. 
x Sanitize farm equipment to avoid spreading seed or vegetative propagules prior to 
leaving fields. 
Difficult to control weeds 
x Fields with difficult to control weeds should be planted in rotation with crops that 
allow the use of herbicides with an alternative mode of action or different 
management practices. 
x Difficult to control weeds may require sequential applications, such as a broad 
spectrum preemergence herbicide followed by one or more postemergence 
herbicide applications. Utilize herbicides containing different modes of action 
effective on the target weeds in sequential applications. 
Do not overuse the technology 
x Do not use this or any other herbicide wit h the same mode of action in a single 
growing season unless mixed with an herbicide with a different mode of action which 
provides overlapping spectrum for the difficult to control weeds. 
Scout and inspect fields following application 
x Prevent an influx of weeds into the fie ld by controlling weeds in field borders. 
x Scout fields after application to verify that the treatment was effective. 
x Suspected herbicide-resistant weeds may be identified by these indicators 
a. Failure to control a weed species normally controlled by the herbicide at the 
dose applied, especially if control is achieved on adjacent weeds; 
b. A spreading patch of non-controlled pl ants of a particular weed species; and 
c. Surviving plants mixed with controll ed individuals of the same species. 
x Report non-performance of this product to your Syngenta retailer, Syngenta 
representative, or call 1-866-Syngent(a) (866-796-4368). If resistance is suspected 
ensure weed escapes are controlled using an herbicide with an effective mode of 
action and/or use non-chemical means to prevent further seed production. 
Prevent weed escapes before, during, and after harvest

13 
 
x Do not allow weed escapes to produce seed or vegetative structures such as tubers 
or stolons which contribute to spread and survival. Consider harvest weed seed 
management and control weeds post-harvest to prevent seed production. 
Resistant Weeds 
x Contact your local Syngenta representative, retailer, crop advisor or extension agent 
to determine if weeds resistant to modes of action contained in this product are 
present in your area. 
x Do not assume that each listed weed is being controlled by multiple modes of action. 
Premixes are intended to broaden the spectrum of weeds that are controlled. Some 
weeds may be controlled by only one of the active ingredients in this product. 
x If resistant biotypes have been reported, use the full labeled rate of this product, 
apply at the labeled timing, and tank-mix with an additional different mode of action 
product so there are multiple effective modes of application for each suspected 
resistant weed. 
APPLICATION INFORMATION 
 
GROUND APPLICATION 
 
Use spray nozzles of the same type and size that are evenly spaced to provide accurate 
and uniform application. 
 
Always ensure that agitation is maintained until spraying is completed, even if stopped 
for brief periods of time. If the agitation is stopped for more than 5 minutes, resuspend 
the spray solution by running on full agitation prior to spraying. 
 
PREPLANT/PREEMERGENCE APPLICATION 
 
Apply Acuron Flexi preplant (up to 28 days prior to corn planting) or preemergence with 
a carrier volume of 10-80 gal/A. 
 
POSTEMERGENCE APPLICATION 
 
Use only clean water as a carrier and apply in a spray volume of 10-30 gal/A. Good 
weed coverage is essential for optimum weed control. When weed foliage is dense, a 
higher application volume may be required to achieve optimum spray coverage. 
 
AERIAL APPLICATION 
 
Do not use aerial application to apply Acuron Flexi. 
 
MANDATORY SPRAY DRIFT MANAGEMENT 
 
Ground Boom Applications:

14 
 
x Do not release spray at a height greater than 3 ft above the ground or crop canopy. 
x Applicators are required to select the nozzles and pressure that deliver medium or 
coarser droplet size in accordance with American Society of Agricultural & Biological 
Engineers Standard 572 (ASABE S572.1). 
x Do not apply when wind speeds exceed 15 mph at the application site. 
x Do not apply during temperature inversions. 
 
Boomless Ground Applications: 
• Applicators are required to select the nozzle and pressure that deliver medium or 
coarser droplet size in accordance with American Society of Agricultural & Biological 
Engineers Standard 572 (ASABE S572.3). 
• Do not apply when wind speeds exceed 15 miles per hour at the application site. 
• 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 ENVIROMENTAL CONDITIONS. 
 
Importance of Droplet Size 
• An effective way to reduce spray dr ift is to apply large droplets. 
• Use the largest droplets that provide target pest control. 
• While applying larger droplets will reduce spray drift, the potential for drift will be 
greater if applications are made improperly or under unfavorable environmental 
conditions. 
Controlling Droplet Size - Ground Boom 
x Volume - Increasing the spray volume so that larger droplets are produced will 
reduce spray drift. Use the highest practical spray volume for the application. If a 
greater spray volume is needed, consider using a nozzle with a higher flow rate. 
x Pressure - Use the lowest spray pressure recommended for the nozzle to produce 
the target spray volume and droplet size. 
x Spray Nozzle - Use a spray nozzle that is designed for the intended application. 
Consider using nozzles designed to reduce drift. 
 
Boom Height - Ground Boom 
x Use the lowest boom height that is comp atible with the spray nozzles that will 
provide uniform coverage. 
x For ground equipment, the boom should remain level with the crop and have 
minimal bounce. 
 
Shielded Sprayers 
x Shielding the boom or individual nozzles can reduce spray drift. Consider using 
shielded sprayers. Verify that the shields are not interfering with the uniform 
deposition of the spray on the target area.

15 
 
 
Temperature and Humidity 
x When making applications in hot and dry conditions, use larger droplets to reduce 
effects of evaporation. 
 
Temperature Inversions 
x Drift potential is high during a temperature inversion. 
x Temperature inversions are characterized by increasing temperature with altitude 
and are common on nights with limited cloud cover and light to no wind. 
x The presence of an inversion can be indicated by ground fog or by the movement of 
smoke from a ground source or an aircraft smoke generator. 
x Smoke that layers and moves laterally in a concentrated cloud (under low wind 
conditions) indicates an inversion, while smoke that moves upward and rapidly 
dissipates indicates good vertical air mixing. 
x Avoid applications during temperature inversions. 
 
Wind 
x Drift potential generally in creases with wind speed. 
x AVOID APPLICATIONS DURING GUSTY WIND CONDITIONS. 
x Applicators need to be familiar with loca l wind patterns and terrain that could affect 
spray drift. 
 
Boomless Ground Applications: 
x Setting nozzles at the lowest effective he ight will help to reduce the potential for 
spray drift. 
 
Handheld Technology Applications 
x Take precautions to minimize drift. 
Cleaning Equipment After Application 
 
Special attention must be given to cleaning equipment before spraying a crop other than 
corn. Mix only as much spray solution as needed. 
 
1. Flush tank, hoses, boom, and nozzles with clean water. 
 
2. Prepare a cleaning solution of 1 gal of household ammonia per 25 gal of water. 
Many commercial spray tank cleaners may be used. 
 
3. Use a pressure washer to clean the inside of the spray tank with this solution. 
Take care to wash all parts of the tank, including the inside top surface. If a 
pressure washer is not available, completely fill the sprayer with the cleaning

16 
 
solution to ensure contact of the cleaning solution with all internal surfaces of the 
tank and plumbing. Start agitation in the sprayer and thoroughly recirculate the 
cleaning solution for at least 15 minutes. Remove all visible deposits from the 
spraying system. 
 
4. Flush hoses, spray lines, and nozzles for at least 1 minute with the cleaning 
solution. 
 
5. Dispose of rinsate from steps 1-3 in an appropriate manner. 
 
6. Repeat steps 2-5. 
 
7. Remove nozzles, screens, and strainers and clean separately in the ammonia 
solution after completing the above procedures. 
 
8. Rinse the complete spraying system with clean water. 
 
ADDITIVES 
 
When an adjuvant is to be used with this product, use an adjuvant that meets the 
standards of the Chemical Producers and Distributors Association (CPDA) adjuvant 
certification program. 
 
Where Acuron Flexi is applied after the corn has emerged, a non-ionic surfactant (NIS) 
at 0.25% v/v (1 qt/100 gal) may be used. The use of crop oil concentrate (COC) may 
result in temporary crop injury. If used, add COC at a rate not to exceed 1% v/v (1 
gal/100 gal) or not more than the equivalent of 1 qt/A. Do not use nitrogen based 
adjuvants (AMS or UAN) or methylated seed oil (MSO) with Acuron Flexi when applied 
alone to emerged corn, or when Acuron Flexi is applied as a postemergence tank 
mixture with other products, unless directed for a specific tank mix on this label or as 
part of a supplemental Acuron Flexi label. Any of these adjuvants may be used at a 
preemergence or preplant timing, i.e. where the corn crop has not yet emerged to 
increase burndown activity on existing weeds. Do not apply Acuron Flexi to emerged 
sweet corn or yellow popcorn or severe crop injury may occur. 
 
Sprinkler Irrigation: Do not apply Acuron Flexi by sprinkler irrigation. Use a sprinkler 
system only to incorporate Acuron Flexi after application. After Acuron Flexi has been 
applied, a sprinkler irrigation system set to deliver ½-1 inch of water may be used to 
incorporate the product. Using more than 1 inch of water could result in reduced 
performance. On sandy soil low in organic matter, use no more than ½ inch of water. 
Do not use flood irrigation to apply or incorporate Acuron Flexi. 
 
APPLICATIONS PRIOR TO CORN EMERGENCE (REFER TO TABLE 1 FOR CORN 
TYPES) 
 
Any adjuvants may be used at a preemergence or preplant timing, (i.e. where the corn

17 
 
crop has not yet emerged) to increase burndown activity on existing weeds. However, 
the best additives for weed control with Acuron Flexi are non-ionic surfactant at 1 qt/100 
gal (0.25% v/v) plus an ammonium sulfate (AMS) product that delivers the equivalent of 
8.5-17 lb/100 gal. 
 
APPLICATIONS AFTER CORN HAS EMERGED (REFER TO TABLE 1 FOR CORN 
TYPES) 
 
When applying Acuron Flexi postemergence to corn, add a non-ionic surfactant (NIS) at 
1 qt/100 gal (0.25% v/v). Using additives other than non-ionic surfactant may result in 
lower levels of weed control and an increased risk of crop injury. 
 
In addition to NIS, an ammonium sulfate (AMS) product that delivers the equivalent of at 
8.5-17 lb/100 gal may also be added. The use of liquid nitrogen based adjuvants (e.g., 
UAN) will increase the risk of crop injury. 
 
Do not use methylated seed oil (MSO) with Acuron Flexi applied alone or in tank 
mixture to emerged corn. 
 
MIXING PROCEDURES 
 
Either water or liquid fertilizers (excluding suspension fertilizers) may be used as 
carriers for preemergence applications. If fluid fertilizers are used, conduct a 
compatibility test prior to mixing and applying this product. Even if Acuron Flexi is 
physically compatible with a fluid fertilizer, constant agitation is necessary to maintain a 
uniform mixture during application. Use only clean water as the carrier when applying 
Acuron Flexi after crop emergence. 
 
The spray tank must be clean, thoroughly rinsed and decontaminated before adding 
either Acuron Flexi alone or with tank-mix partners. If water is used as the carrier, use 
clean water. 
 
Always refer to labels of other pesticide products for mixing directions and precautions 
which may differ from those outlined here. Use in accordance with the most restrictive 
label limitations and precautions. This product cannot be mixed with any product 
containing a label prohibition against such mixing. Do not tank mix Acuron Flexi with 
any other insecticide, fungicide, fertilizer solution, or adjuvant not on this label without 
testing compatibility, as poor mixing may result. Determine the compatibility of any 
tank-mix combination by conducting a small scale test such as a jar test before actual 
tank mixing. 
 
USE THE FOLLOWING MIXING INSTRUCTIONS FOR ADDING ACURON FLEXI TO 
THE SPRAY TANK 
 
1. Only use sprayers in good operating condition with adequate agitation. Ensure 
the sprayer is cleaned according to instructions on label of the product used prior

18 
 
to use of Acuron Flexi. 
 
2. Begin to fill sprayer tank or premix tank with clean water and engage agitator. 
Agitation must be continued throughout the entire mixing and spraying 
procedure. 
 
3. When the sprayer or premix tank is half full of water, begin to add the mixture 
components. 
 
4. If ammonium sulfate (AMS) is used, add slowly and continue agitation until 
completely dispersed.
 
 
5. If a wettable powder or dry flowable formulation is used, add it slowly to the tank. 
Mixing and compatibility may be improved when a wettable powder or dry 
flowable is diluted with water before adding to the tank. Agitate during the 
procedure.
 
 
6. If a flowable formulation is used, add slowly to the tank. 
 
7. Add Acuron Flexi slowly to the tank. 
 
8. Add any other liquid tank-mix products next with emulsifiable concentrates last. 
 
9. Add an adjuvant last, if needed. 
 
10. Complete filling the sprayer tank and continue agitation. 
 
11. Apply as soon as possible after spray mi xture is prepared. Do not leave mixture 
in spray tank overnight without agitation. 
 
If Acuron Flexi is added to the spray tank via induction, compatibility may be 
compromised. If an induction tank (or similar equipment) is used, add each product 
separately and allow each to disperse into the spray tank before adding the next 
product. For best tank-mix compatibility, rinse the induction tank with water before 
adding each component. 
 
To avoid mixing issues, do not add Acuron Flexi to the spray tank via in-line injection. 
 
COMPATIBILITY TEST 
 
Conduct a jar test (1 pt to 1 qt container) before tank mixing to ensure compatibility of 
Acuron Flexi with liquid fertilizers or other pesticides. Start by adding the intended 
carrier (water or liquid fertilizer) to the jar. Next, add the appropriate amount of 
pesticide(s) in their relative proportions based on recommended label rates. If more 
than one pesticide is used, add them separately as described in the Mixing Procedures 
section of this label. After each addition, shake or stir gently to thoroughly mix.

19 
 
After adding all ingredients, put a lid on the jar, tighten, and invert each jar 10 times to 
mix. Let the mixtures stand 15-30 minutes and then examine for separation, large 
flakes, precipitates, gels, heavy oily film on the jar, or other signs of incompatibility. If 
the mixture separates but can be remixed readily, the mixture can be sprayed as long 
as good agitation is used. 
 
If the mixtures are incompatible, repeat the test using a compatibility agent at the 
recommended rate. If incompatibility is still observed, do not use the mixture. 
 
EQUIPMENT CLEANING PROCEDURE 
 
Prior to use of Acuron Flexi, follow the cleanup procedures specified on the label of the 
product(s) previously sprayed. If no instructions are provided, follow the instructions 
below. 
 
To avoid subsequent crop injury, following the last application of Acuron Flexi, 
thoroughly clean all mixing and spray equipment per the instructions below. 
 
1. Flush tank, hoses, boom, and nozzles with clean water. 
 
2. Prepare a cleaning solution of 1 gal of household ammonia per 25 gal of water. 
Many commercial spray tank cleaners may be used. 
 
3. Use a pressure washer to clean the insi de of the spray tank with this solution. 
Take care to wash all parts of the tank, including the inside top surface. If a 
pressure washer is not available, completely fill the sprayer with the cleaning 
solution to ensure contact of the cleaning solution with all internal surfaces of the 
tank and plumbing. Start agitation in the sprayer and thoroughly recirculate the 
cleaning solution for at least 15 minutes. Remove all visible deposits from the 
spraying system. 
 
4. Flush hoses, spray lines, and nozzles for at least 1 minute with the cleaning 
solution. 
 
5. Remove boom end caps and flush dead space areas, with water, then replace 
caps. 
 
6. Dispose of rinsate from steps 1-5 in an appropriate manner, according to all local 
State and Federal regulations. 
 
7. Repeat steps 2-6. 
 
8. Remove nozzles, screens, and strainers and clean separately in the ammonia 
solution after completing the above procedures. 
 
9. Rinse the complete spraying system with clean water.

20 
 
 
WEEDS CONTROLLED 
 
Acuron Flexi applied as directed in this label will control or partially control the weeds 
listed in Tables 2 and 3. Optimum weed control will be obtained if Acuron Flexi is 
applied according to all label directions. 
 
If a significant rainfall does not occur within 7 days following a preemergence 
application, weed control may be decreased. 
 
When weeds are stressed or not actively growing due to drought, heat, lack of fertility, 
flooding, or prolonged cool temperatures, postemergence control can be reduced or 
delayed.

21 
 
Table 2. Weeds Controlled or Partially Controlled Preemergence by Acuron Flexi 
 
Common Name Scientific Name Weed Rating1 
Broadleaf Weeds 
Amaranth, Palmer Amaranthus palmeri C 
Amaranth, Powell Amaranthus powellii C 
Buckwheat, wild Polygonum convolvulus PC 
Carpetweed Mollugo verticillata C 
Cocklebur, common Xanthium strumarium PC2 
Horseweed (marestail) Conyza canadensis C 
Jimsonweed Datura stramonium C 
Kochia Kochia scoparia PC 
Lambsquarters, common Chenopodium album C 
Mallow, Venice Hibiscus trionum C 
Morningglory, entireleaf Ipomoea hederacea PC2 
Morningglory, ivyleaf Ipomoea hederacea PC2 
Mustard, wild Sinapis arvensis C 
Nightshade, black Solanum nigrum C 
Nightshade, Eastern black Solanum ptycanthum C 
Nightshade, hairy Solanum sarachoides C 
Pigweed, redroot Amaranthus retroflexus C 
Pigweed, smooth Amaranthus hybridus C 
Puncturevine Tribulus terrestris PC 
Purslane, common Portulaca oleracea C 
Purslane, pink Portulaca pilosa C 
Pusley, Florida Richardia scabra C 
Ragweed, common Ambrosia artemisiifolia C 
Ragweed, giant Ambrosia trifida C 
Sicklepod Senna obtusifolia C 
Sida, prickly Sida spinosa C 
Smartweed, ladysthumb Polygonum persicaria C 
Smartweed, Pennsylvania Polygonum pensylvanicum C 
Sunflower, common Helianthus annuus PC 
Thistle, Russian Salsola tragus PC 
Velvetleaf Abutilon theophrasti C 
Waterhemp, common Amaranthus rudis C 
Waterhemp, tall Amaranthus tuberculatus C 
Grass Weeds 
Barnyardgrass Echinochloa crus-galli C 
Crabgrass, large Digitaria sanguinalis C 
Crowfootgrass Dactyloctenium aegyptium C 
Cupgrass, prairie Eriochloa contracta PC 
Cupgrass, Southwestern Eriochloa acuminata PC 
Cupgrass, woolly Eriochloa villosa PC 
Foxtail, giant Setaria faberi C

22 
 
Common Name Scientific Name Weed Rating1 
Foxtail, green Setaria viridis C 
Foxtail, robust (purple, white) Setaria viridis C 
Foxtail, yellow Setaria pumila C 
Goosegrass Eleusine indica C 
Johnsongrass, seedling Sorghum halepense PC 
Millet, foxtail Setaria italica C 
Millet, wild proso Panicum miliaceum PC 
Panicum, browntop Panicum fasciculatum C 
Panicum, fall Panicum dichotomiflorum C 
Panicum, Texas Panicum texanum PC 
Rice, red Oryza sativa C 
Ryegrass, Italian Lolium multiflorum C 
Sandbur, field Cenchrus incertus PC 
Shattercane Sorghum bicolor PC 
Signalgrass, broadleaf Brachiaria platyphylla PC2 
Sprangletop, red Leptochloa filiformis C 
Stinkgrass Eragrostis cilianensis C 
Witchgrass Panicum capillare C 
Sedges 
Nutsedge, yellow Cyperus esculentus PC 
1C = Control, PC = Partial Control 
2Adding atrazine as a tank mixture will provide control.

23 
 
 
Table 3: Weeds Controlled or Partially Controlled by Early Postemergence 
Applications of Acuron Flexi 
 
Acuron Flexi applied early postemergence will provide control or partial control of small 
emerged broadleaf weeds (less than 3 inches) but will not provide consistent or 
effective control of weeds identified as resistant to postemergence HPPD inhibitors. 
 
Common Name Scientific Name Weed Rating1 
Broadleaf Weeds 
Amaranth, Palmer Amaranthus palmeri C 
Amaranth, Powell Amaranthus powellii C 
Buckwheat, wild Polygonum convolvulus C 
Buffalobur Solanum rostratum C 
Carpetweed Mollugo verticillata C 
Cocklebur, common Xanthium strumarium C 
Dandelion Taraxacum officinale PC 
Galinsoga Galinsoga parviflora C 
Hemp Cannabis sativa C 
Horsenettle Solanum carolinense C 
Horseweed (marestail) Conyza canadensis C 
Jimsonweed Datura stramonium C 
Kochia Kochia scoparia PC 
Lambsquarters, common Chenopodium album C 
Mallow, Venice Hibiscus trionum C 
Morningglory, entireleaf Ipomoea hederacea C 
Morningglory, ivyleaf Ipomoea hederacea C 
Mustard, wild Brassica kaber C 
Nightshade, black Solanum nigrum C 
Nightshade, Eastern black Solanum ptycanthum C 
Nightshade, hairy Solanum sarachoides C 
Nutsedge, yellow Cyperus esculentus PC 
Pigweed, redroot Amaranthus retroflexus C 
Pigweed, smooth Amaranthus hybridus C 
Pokeweed Phytolacca americana C 
Potatoes, volunteer Solanum spp. C 
Puncturevine Tribulus terrestris PC 
Purslane, pink Portulaca pilosa C 
Ragweed, common Ambrosia artemisiifolia C 
Ragweed, giant Ambrosia trifida C 
Sicklepod Senna obtusifolia C 
Sida, prickly Sida spinosa PC 
Smartweed, ladysthumb Polygonum persicaria C 
Smartweed, Pennsylvania Polygonum pensylvanicum C

24 
 
Common Name Scientific Name Weed Rating1 
Thistle, Russian Salsola tragus PC2 
Thistle, Canada Cirsium arvense PC 
Velvetleaf Abutilon theophrasti C 
Waterhemp, common Amaranthus rudis C 
Waterhemp, tall Amaranthus tuberculatus C 
Grass Weeds 
Barnyardgrass Echinochloa crus-galli PC2 
Crabgrass, large Digitaria sanguinalis C2 
Foxtail, giant Setaria faberii PC2 
Signalgrass, broadleaf Brachiaria platyphylla PC2 
Sedges 
Nutsedge, yellow Cyperus esculentus PC 
1C = Control, PC = Partial Control 
2Apply before weeds exceed 2 inches in height. 
 
ROTATIONAL CROPS 
 
When Acuron Flexi is applied as directed on this label, follow the crop rotation intervals 
in Table 4. If Acuron Flexi is tank mixed with other products, follow the most restrictive 
product’s crop rotation interval. 
 
Table 4. Crop Rotational Intervals 
 
Crop Replant/Rotational Interval 
Field corn 
Silage corn
 
Seed corn 
Yellow popcorn 
Sweet corn 
Anytime1 
Small grain cereals including wheat, barley and rye 4 Months 
Alfalfa 
Cotton
 
Dry beans2 
Peanuts 
Potato 
Rice 
Soybeans 
Sorghum (all types) 
10 Months3 
All other rotational crops 18 Months 
1Do not exceed a total of 2.25 qt of Acuron Flexi per year. 
2This rotational interval applies only to areas west of US Highway 83 in the states of 
Colorado and Nebraska: If Acuron Flexi was applied to ground that was under center 
pivot irrigation and the soil pH is greater than 6.5, dry beans can be planted 10 months 
following application.

25 
 
3If applied after June 1, rotating to crops other than corn (all types) may result in crop 
injury. 
 
CORN USE DIRECTIONS – ACURON FLEXI ALONE 
 
Apply Acuron Flexi for preemergence control of many annual grass and broadleaf 
weeds in field corn, silage corn, seed corn, sweet corn and yellow popcorn. Acuron 
Flexi may also be applied early postemergence for the control of broadleaf weeds in 
field corn, silage corn and seed corn. Do not apply Acuron Flexi to yellow popcorn or 
sweet corn after the crop has emerged, or crop injury may occur. Refer to Tables 2 and 
3 for a list or weeds controlled or partially controlled by Acuron Flexi. 
 
ACURON FLEXI USE RATES 
 
Apply Acuron Flexi preemergence or postemergence at a rate of 2.0-2.25 qt/A for 
control or partial control of the weeds listed in Tables 2 and 3. The application rate is 
based on the soil organic matter content of the field on which Acuron Flexi is to be 
applied. Acuron Flexi may also be applied as a split application. Refer to the split 
application section for directions. 
 
Table 5. Acuron Flexi Use Rates in Corn 
 
% Organic Matter Acuron Flexi Use Rate 
<3% 2.0 qt/A 
>3% 2.25 qt/A 
 
Acuron Flexi is not recommended on soils with greater than 10% organic matter or poor 
weed control may result. 
 
BURNDOWN FOR REDUCED AND NO TILLAGE SITUATIONS 
 
In reduced or no-till corn and before the crop has emerged, Acuron Flexi can be applied 
alone or in tank mixture with Gramoxone® brands, Touchdown® brands, Roundup® 
brands or other registered herbicides for burndown of existing weeds. Refer to Tables 2 
and 3 for specific weeds controlled by Acuron Flexi. Read and follow all product labels 
for specific use directions and information on weeds controlled. Refer to the 
ADDITIVES and TANK MIX sections on this label for additional instructions. 
 
EARLY PREPLANT AND PREEMERGENCE 
 
Acuron Flexi may be applied early preplant (up to 28 days prior to planting) or 
preemergence in field corn, silage corn, seed corn, sweet corn and yellow popcorn.

26 
 
POSTEMERGENCE 
 
Acuron Flexi may be applied in field corn, silage corn or seed corn after emergence until 
the plants reach 30 inches in height or up to the 8-leaf stage of corn growth. Use only 
clean water as the carrier when applying Acuron Flexi after crop emergence. Do not 
apply postemergence in liquid fertilizer or severe crop injury will occur. Do not apply 
Acuron Flexi to emerged yellow popcorn or sweet corn, or severe crop injury may occur. 
Refer to the ADDITIVES section on this label for burndown adjuvant directions. 
 
SPLIT APPLICATION 
 
Acuron Flexi may be applied as a split application in corn (for grain, silage or seed). For 
a split application program, apply ½ to ⅔ of the labeled rate of Acuron Flexi prior to crop 
emergence followed by a second Acuron Flexi application at ⅓ to ½ of the labeled rate 
as a post application after corn emergence. The total amount of Acuron Flexi applied in 
the split application program cannot exceed 2.25 qt/A in soils with <3% OM and cannot 
exceed 2.25 qt/A in soils with ≥3% OM. Refer to the Early Postemergence section 
above for instructions on postemergence applications. 
 
CORN USE DIRECTIONS – ACURON FLEXI TANK MIXTURES 
 
PREEMERGENCE (APPLIED BEFORE THE CROP HAS EMERGED) 
 
Tank-mix partners listed in Table 6 may be used in conventional, reduced, or no-till 
systems. Read and follow all tank-mix product labels for use rates and restrictions. 
 
Table 6: Acuron Flexi Tank Mixtures for Preemergence Applications in Corn 
 
Tank Mix1 Objective 
AAtrex® or other solo atrazine products Improved broadleaf and grass weed control 
Banvel®, Clarity® Improved control of emerged broadleaves 
Gramoxone Brands Improved control of emerged weeds 
Tricor® or other solo metribuzin products Improved broadleaf weed control 
Princep® Brands Improved broadleaf and grass weed control 
Touchdown Brands Burndown existing weeds 
Roundup Brands Burndown existing weeds 
2,4-D Burndown existing weeds 
Warrior® Brands To control insects, such as cutworm 
1Read and follow all tank-mix product label directions for use, precautions, and 
restrictions.

27 
 
EARLY POSTEMERGENCE (APPLIED AFTER THE CROP HAS EMERGED) 
 
Tank-mix products listed in Table 7 may be used in conventional, reduced, or no-till 
systems. Read and follow all tank-mix product labels for use rates and restrictions. 
Perform a compatibility test to ensure the tank mixture is physically compatible. Do not 
apply Acuron Flexi postemergence to sweet corn or yellow popcorn. 
 
Table 7: Acuron Flexi Tank Mixtures for Postemergence Applications in Field 
Corn 
 
Tank Mix1,2 Objective 
AAtrex or other solo atrazine 
products 
Improved broadleaf and annual grass weed control 
Accent® Q Emerged grass control 
Basis® Blend Emerged grass control 
NorthStar® Improved broadleaf and grass weed control 
Peak® Improved broadleaf and grass weed control 
Resolve® Q Emerged grass control 
Roundup Brands See instructions under “Acuron Flexi Programs in 
glyphosate tolerant Corn” section of this label 
Spirit® Improved broadleaf and grass weed control 
Status® Improved broadleaf control 
Steadfast® Q Emerged grass control 
Touchdown Brands See instructions under “Acuron Flexi Programs in 
glyphosate tolerant Corn” section of this label 
Warrior Brands To control insects, such as cutworm 
1Read and follow all tank-mix product label directions for use, precautions, and 
restrictions. 
2Consult the “Additives” section of this label and tank mixture label(s) for 
recommendations when applying Acuron Flexi in tank mixture to emerged field corn. 
 
ACURON FLEXI PROGRAMS IN GLYPHOSATE TOLERANT CORN 
 
Acuron Flexi may be applied early postemergence at a rate of 1.25-2.0 qt/A for soils 
with <3% organic matter content and a rate of 1.25-2.25 qt/A for soils with >3% organic 
matter content in a tank mixture with a solo glyphosate product (e.g. Touchdown or 
Roundup brands) that is registered for use over-the-top in glyphosate tolerant field corn 
(e.g. Roundup Ready or Agrisure® GT Corn). To minimize weed competition with the 
crop, target the application of this mixture to weeds in the 1 to 2 inches tall. If the 
glyphosate product has a built-in adjuvant system (i.e. the product label does not ask for 
additional adjuvant), spray-grade ammonium sulfate (AMS) may be added at 8.5 lb/100 
gal to this mixture. If the glyphosate product label calls for an adjuvant in addition to 
AMS, add a non-ionic surfactant (NIS) at 0.25% v/v and AMS to this spray mixture. Do 
not add urea ammonium nitrate (UAN), crop oil concentrate (COC), or methylated seed 
oil (MSO) type adjuvants to these mixtures, or crop injury may occur. Read and follow 
all directions for use and restrictions on the glyphosate product label.

28 
 
 
Alternatively, Acuron Flexi may be applied preemergence to glyphosate tolerant corn 
(e.g. Roundup Ready or Agrisure GT Corn) at a rate of 1.35-2.0 qt/A (soils with <3% 
organic matter) or a rate of 1.5-2.25 (soils with >3% organic matter) as part of a two-
pass weed control system when followed by a postemergence application of a 
glyphosate based product. When used in this way, Acuron Flexi will provide reduced 
competition of the weeds listed in Table 2 for a period of 30 or more days, thus 
improving the timing flexibility and effectiveness of the glyphosate based product 
application. Read and follow all directions for use and restrictions on the glyphosate 
product label. 
 
Acuron Flexi may be applied preemergence to glyphosate tolerant corn (e.g. Roundup 
Ready or Agrisure GT Corn) at 1.0-1.2 qt/A as part of a two-pass weed control system 
when followed by Halex® GT. Apply Acuron Flexi at 1.0 qt/A on soils with <3% OM and 
1.2 qt/A on soils with >3% OM. Read and follow all directions for use and restrictions on 
each product label. 
 
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. Can be stored at temperatures as low as -10qF. Keep away from heat and 
flame. 
 
Pesticide Disposal 
 
Open dumping is prohibited. Waste 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 
as described above, contact your State Pesticide or Environmental Control Agency, or 
the Hazardous Waste Representative at the nearest EPA Regional Office for guidance. 
 
Container Handling [equal to or less than 5 gallons] 
 
Non-refillable container. Do not reuse or refill this container. Offer for recycling if 
available. Triple rinse container (or equivalent) promptly after emptying. Triple rinse as 
follows: Empty the remaining contents into application equipment or a mix tank. Drain 
for 10 seconds after the flow begins to drip. Fill the container ¼ full with water and 
recap. Shake for 10 seconds. Pour rinsate into application equipment or a mix tank or 
store rinsate for later use and disposal. Drain for 10 seconds after the flow begins to 
drip. Repeat this procedure two more times. Then offer for recycling if available or

29 
 
puncture and dispose of in a sanitary landfill, or by incineration, or by other procedures 
approved by state and local authorities. 
 
Container Handling [greater than 5 gallons] 
 
Refillable container. Refill this container with pesticide only. Do not reuse this container 
for any other purpose. Cleaning the container before final disposal is the responsibility 
of the person disposing of the container. Cleaning before refilling is the responsibility of 
the person refilling. To clean container before final disposal, empty the remaining 
contents from this container into application equipment or mix tank. Fill the container 
about 10 percent full with water. Agitate vigorously or recirculate water with the pump 
for 2 minutes. Pour or pump rinsate into application equipment or rinsate collection 
system. Repeat this rinsing procedure two more times. Then offer for recycling if 
available or puncture and dispose of in a sanitary landfill, or by incineration, or by other 
procedures approved by state and local authorities. 
 
Container Handling [greater than 5 gallons] 
 
Non-refillable container. Do not reuse or refill this container. Triple rinse container (or 
equivalent) promptly after emptying. Triple rinse as follows: Empty the remaining 
contents into application equipment or a mix tank. Fill the container ¼ full with water. 
Replace and tighten closures. Tip container on its side and roll it back and forth, 
ensuring at least one complete revolution, for 30 seconds. Stand the container on its 
end and tip it back and forth several ties. Turn the container over onto its other end and 
tip it back and forth several times. Empty the rinsate into application equipment or a mix 
tank or store rinsate for later use or disposal. Repeat this procedure two more times. 
Then offer for recycling if available or puncture and dispose of in a sanitary landfill, or by 
incineration, or by other procedures approved by state and local authorities. 
 
CONTAINER IS NOT SAFE FOR FOOD, FEED, OR DRINKING WATER! 
 
 
AAtrex®, Acuron™ Flexi, Agrisure® GT, Gramoxone®, Halex® GT, NorthStar®, Peak®, 
Princep®, Spirit®, Touchdown®, Warrior®, and the Syngenta logo are trademarks of a 
Syngenta Group Company 
 
Accent® Q, Basis®, Resolve® Q, Steadfast® Q and Viton® are trademarks of E. I. du 
Pont de Nemours and Company 
 
Banvel®, Clarity®, Counter® and Status® are trademarks of BASF Corporation 
 
Roundup® is a trademark of Monsanto Company 
 
Tricor® is a trademark of United Phosphorus, Inc. 
 
”201X Syngenta

30 
 
 
 
For non-emergency information (e.g., current product information), call 
Syngenta Crop Protection at 1-800-334-9481 
 
 
Manufactured for: 
Syngenta Crop Protection, LLC 
P. O. Box 18300 
Greensboro, North Carolina 27419-8300 
 
SCP 1568 
 
 
Acuron Flexi 1568 MAS 0216 AMEND-D JUN2021-CL - CM – 11/29/2022 
000100-01568.20210610D.Acuron_Flexi.AMEND.JUN2021-CL.pdf