crop-chem-docs/corpus/epa_ppls/100-1087.md

# FORCE ST INSECTICIDE

- EPA Reg No: **100-1087**
- Registrant: SYNGENTA CROP PROTECTION, LLC
- Signal word: Caution
- Active ingredients: Tefluthrin (26.8%)
- Label accepted: 2026-08-13
- Source PDF: https://www3.epa.gov/pesticides/chem_search/ppls/000100-01087-20260813.pdf

---
August 13, 2026 
 
Victoria Kleczewski 
Regulatory Manager 
Syngenta Professional Solutions 
Syngenta Crop Protection, LLC 
P.O. Box 18300 
Greensboro, NC 27149 
Victoria.kleczewski@syngenta.com 
 
 
Subject: Label Amendment - Registration Review Mitigation for Tefluthrin 
 Product Name: Force ST 
 EPA Registration Number: 100-1087 
Case Number: 472916 
Application Dates: February 8, 2021 
 
Dear Victoria Kleczewski: 
 
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 
Tefluthrin Interim Decision, and has concluded that your submission is 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 
Assurance.

Page 2 of 2 
EPA Reg. No. 100-1087 
Case No. 472916 
 
A stamped copy of your labeling is enclosed for your records. This labeling supersedes 
all previously accepted labeling and must be used at your next label printing. 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 Patricia Biggio by phone at 202-566-
1938, or via email at biggio.patricia@epa.gov. 
 
 Sincerely, 
 
 Dana L. Friedman, Chief
 
Risk Management and Implementation Branch 1 
Pesticide Re-Evaluation Division 
Office of Pesticide Programs 
U.S. Environmental Protection Agency 
 
 
 
ENCLOSURE: Stamped label

TEFLUTHRIN GROUP 3A INSECTICIDE
Force® ST
Insecticide
For Commercial Seed Treatment of Field Corn, Popcorn,
Seedcorn, and Sweet Corn
(Not for Use on Agricultural Establishments in Hopper-box, Planter-box, Slurry-box, or 
Other Seed Treatment Applications at or Immediately Before Planting)
Active Ingredient:
Tefluthrin
(2,3,5,6-tetrafluoro-4-methylphenyl)methyl-(1D,3D)-(Z)-(±)-3-(2-chloro-3,3,3-trifluoro-
1-propenyl)-2,2-dimethylcyclopropanecarboxylate.................................................. 26.8%
*Inert Ingredients: 73.2%
Total 100.0%
*Contains Petroleum Distillates
Contains 2.5 lbs. active ingredient per gal.
KEEP OUT OF REACH OF CHILDREN
CAUTION
See additional precautionary statements and directions for use (inside booklet; on back 
panel; on side panel)
EPA Reg No. 100-1087
EPA Est No. 
Product of the United Kingdom
Formulated in USA
SCP 1087-MAS 0809
Product ID
U.S. Standard Measure
Aug 13, 2026
100-1087

Force ST 
2 
FIRST AID 
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 Remove person to fresh air. 
x If person is not breathing, call 911 or an ambulance, then give 
artificial respiration, preferably mouth-to-mouth, if possible. 
x Call a poison control center or doctor for further treatment advice. 
If swallowed x Call a poison control center or doctor immediately for treatment 
advice. 
x Do not give any liquid to the person. 
x Do not induce vomiting unless told to do so by a poison control 
center or doctor. 
x Do not give anything by mouth to an unconscious person. 
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. 
NOTE TO PHYSICIAN 
Contains petroleum distillates. Vomiting may cause aspiration pneumonia. 
Have the product container or label with you when calling a poison control center or 
doctor or going for treatment. 
HOTLINE NUMBER 
For 24-Hour Medical Emergency Assistance (Human or Animal) 
or Chemical Emergency Assistance (Spill, Leak, Fire, or Accident), 
Call 
1-800-888-8372 
 
 
PRECAUTIONARY STATEMENTS 
 
Hazards to Humans and Domestic Animals 
 
CAUTION 

Harmful if absorbed through skin or inhaled. Avoid contact with skin or clothing. 
Avoid breathing spray mist. Wash thoroughly with soap and water after handling and 
before eating, smoking or using toilet facilities. Remove contaminated clothing and 
wash before reuse.

Force ST 
3 
Personal Protective Equipment (PPE) 
 
Applicators and other handlers must wear: 
 
x Long-sleeved shirt and long pants 
x Chemical resistant gloves made of barrier laminate, nitrile rubber ı 14 mils, 
neoprene rubber > 14 mils, or Viton® ı 14 mils 
x Shoes plus socks 
 
Follow the manufacturer’s instructions for cleaning/maintaining PPE. If no such 
instructions for washables exist, use detergent and hot water. Keep and wash PPE 
separately from other laundry. 
 
Skin exposure may result in a transient sensation described as a tingling, itching, 
burning, or prickly feeling. Onset may occur immediately to 4 hours after exposure and 
may last 2-30 hours, without apparent skin damage. Wash exposed areas once with 
soap and water. Relief from the skin sensation may be obtained by applying an 
oil-based cream. 
 
Environmental Hazards 
 
This pesticide is very highly toxic to freshwater and estuarine fish and invertebrates. 
Exposed treated seeds may be hazardous to birds and other wildlife. 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 disposing of equipment 
washwaters. Dispose of all excess treated seeds by burial away from bodies of water. 
In the event that treated seeds are spilled and cannot be salvaged, completely cover 
them with soil. 
 
Runoff from exposed treated seed is very highly toxic to freshwater fish and estuarine 
fish and invertebrates. Runoff may be hazardous to aquatic organisms in neighboring 
areas. Dispose of all excess treated seed by burial away from bodies of water. 
 
Note: Seed commercially treated with this product must be adequately dyed with a 
suitable color to prevent its accidental use as food for man or feed for animals. Refer to 
21 CFR, Part 2.25. Any dye added to treated seed must be cleared for use under 40 
CFR, Part 180.1001. Labels attached to the treated seed must read: "Treated seed 
should not be used for or mixed with food or animal feed or processed for oil".

Force ST 
4 
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 pur chase price will be 
refunded. 
 
The Directions for Use of this product must be followed carefully. It is impossible to 
eliminate all risks inherently associated with the use of this product. Crop injury, 
ineffectiveness or other unintended consequences may result because of such factors as 
manner of use or application, weather or crop conditions, presence of other materials or 
other influencing factors in the use of the product, which are beyond the control of 
SYNGENTA CROP PROTECTION, LLC or Seller. To the extent permitted by applicable 
law, Buyer and User agree to hold SYNGENTA and Seller harmless for any claims 
relating to such factors. 
 
SYNGENTA warrants that this product conforms to the chemical description on the label 
and is reasonably fit for the purposes stated in the Directions for Use, subject to the 
inherent risks referred to above, when used in accordance with directions under normal 
use conditions. To the extent permitted by applicable law: (1) this warranty does not 
extend to the use of the product contrary to label instructions, or under conditions not 
reasonably foreseeable to or beyond the control of Seller or SYNGENTA, and (2) Buyer 
and User assume the risk of any such use. TO THE EXTENT PERMITTED BY 
APPLICABLE LAW, SYNGENTA MAKES NO WARRANTIES OF MERCHANTABILITY 
OR OF FITNESS FOR A PARTICULAR PURPOSE NOR ANY OTHER EXPRESS OR 
IMPLIED WARRANTY EXCEPT AS WARRANTED BY THIS LABEL. 
 
To the extent permitted by applicable law, in no event shall SYNGENTA be liable for any 
incidental, consequential or special damages resulting from the use or handling of this 
product. TO THE EXTENT PERMITTED BY APPLICABLE LAW, THE EXCLUSIVE 
REMEDY OF THE USER OR BUYER, AND THE EXCLUSIVE LIABILITY OF 
SYNGENTA AND SELLER FOR ANY AND A LL 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.

Force ST 
5 
DIRECTIONS FOR USE 
 
It is a violation of Federal law to use this product in a manner inconsistent with its 
labeling. 
 
This product is to be used in liquid slurry seed treaters and seed coating equipment. 
 
Not for use on agricultural establishments in hopper-box, planter-box, slurry-box, or 
other seed treatment applications at or immediately before planting. 
 
The Environmental Protection Agency has established tolerances under the Federal 
Food, Drug, and Cosmetic Act for certain pesticide residues. In order that residues of 
food and forage crops will not exceed established tolerances, use only at the 
recommended rates. 
 
Treated seed must not be used for or mixed with food or animal feed or processed for 
oil. Seed commercially treated with Force® ST insecticide must be labeled in 
accordance with all applicable requirements of the Federal Seed Act. 
 
Do not follow seed treatment with a lay-by application of Force 3G insecticide. 
 
RESISTANCE MANAGEMENT 
 
For resistance management, Force ST Insecticide contains a Group 3A insecticide. 
Any insect population may contain individuals naturally resistant to Force ST Insecticide 
and other Group 3A insecticides. The resistant individuals may dominate the insect 
population if this group of insecticides is used repeatedly in the same fields. Appropriate 
resistance-management strategies should be followed. 
 
To delay insecticide resistance, take the following steps: 
 
x Rotate the use of Force ST Insecticide or other Group 3A insecticides within a 
growing season, or among growing seasons, with different groups that control 
the same pests. 
x Use tank mixtures with insecticides from a different group that are equally 
effective on the target pest when such use is permitted. Do not rely on the same 
mixture repeatedly for the same pest population. Consider any known cross-
resistance issues (for the targeted pests) between the individual components of a 
mixture. In addition, consider the following recommendations provided by the 
Insecticide Resistance Action Committee (IRAC): 
o Individual insecticides selected for use in mixtures should be highly 
effective and be applied at the rates at which they are individually 
registered for use against the target species. 
o Mixtures with components having the same IRAC mode of action 
classification are not recommended for insect resistance management.

Force ST 
6 
o When using mixtures, consider any known cross-resistance issues 
between the individual components for the targeted pest(s). 
o Mixtures become less effective if resistance is already developing to one 
or both active ingredients, but they may still provide pest management 
benefits. 
o The insect resistance management benefits of an insecticide mixture are 
greatest if the two components have similar periods of residual insecticidal 
activity. Mixtures of insecticides with unequal periods of residual 
insecticide activity may offer an insect resistance management benefit 
only for the period where both insecticides are active. 
x Adopt an integrated pest management program for insecticide use that includes 
scouting, uses historical information related to pesticide use, crop rotation, record 
keeping, and which considers cultural, biological and other chemical control 
practices. 
x Monitor after application for unexpected target pest survival. If the level of 
survival suggests the presence of resistance, consult with your local university 
specialist or certified pest control advisor. 
x Contact your local extension specialist or certified crop advisors for any 
additional pesticide resistance-management and/or IPM recommendations for 
the specific site and pest problems in your area. 
x For further information or to report suspected resistance contact Syngenta Crop 
Protection at 1-866-796-4368. 
 
 
 
Force ST insecticide, when used at labeled rates, will protect germinating seeds and 
seedlings against injury by seed corn maggots and wireworms. Use the following rates 
on the crop listed: 
 
CROP USE 
RATE/CWT 
Field Corn, Popcorn, Seedcorn, Sweet Corn 3-4 fl. oz. 
 
Force ST insecticide, when used at labeled rates, will protect germinating seeds and 
seedlings against injury by cutworm1, northern corn rootworm, seedcorn maggot, 
southern corn rootworm, western corn rootworm, white grub, and wireworms. Use the 
following rates on the crop listed: 
 
CROP USE 
RATE/CWT 
Field Corn, Seedcorn, Sweet Corn 24-27 fl. oz. 
 
1suppression only

Force ST 
7 
Force ST insecticide may be applied in combination with other seed protectant products 
such as Apron®, Captan, Maxim® XL, and Thiram. It is always recommended to check 
the compatibility of these mixtures before large-scale mixing and seed treatment take 
place. 
 
 
STORAGE AND DISPOSAL 
 
Do not contaminate water, food, or feed by storage or disposal. Open dumping is 
prohibited. 
 
Pesticide Storage 
 
Store in a dry place. Protect from freezing temperatures. Do not store at temperatures 
above 40
oC (104oF). 
 
Pesticide Disposal 
 
Pesticide wastes are toxic. Improper disposal of excess pesticide, spray mixtures, or 
rinsate is a violation of Federal law. If these wastes cannot be disposed of by use 
according to the label instructions, contact your State pesticide or environmental control 
agency, or the Hazardous Waste representative at the nearest EPA regional office for 
guidance. 
 
Container Handling [non-refillable bulk/mini-bulk] 
 
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 mix tank. Fill the 
container ¼ full with water. Replace and tighten closures. Tip container on its side and 
roll it back and forth, ensuring at least one complete revolution, for 30 seconds. Stand 
the container on its end and tip it back and forth several times. Turn the container over 
onto its other end and tip it back and forth several times. Empty the rinsate into 
application equipment or mix tank or store rinsate for later use or disposal. Repeat this 
procedure two more times. Then offer for recycling if available or 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. 
 
Container Handling [refillable bulk/mini-bulk] 
 
Refillable container. Refill this container with pesticide only. Do not use the 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 refiller. To clean container before final disposal, empty the remaining contents from 
container into application equipment or mix tank. Fill container about 10 percent full 
with water. Agitate vigorously or recirculate water with the pump for 2 minutes. Pour or

Force ST 
8 
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, if allowed by state and local 
authorities, by burning. If burned, stay out of smoke. 
 
© 20XX Syngenta 
 
Apron®, Force®, Maxim® XL and the Syngenta logo are trademarks of a Syngenta 
Group Company 
 
 
For non-emergency (e.g., current product information) call 
Syngenta Crop Protection at 1-800-334-9481 
 
 
Product of the United Kingdom 
 
Formulated in the USA 
 
Manufactured for : 
Syngenta Crop Protection, LLC 
P.O. Box 18300 
Greensboro, North Carolina 27419-8300 
 
Force ST 1087 MAS 0809 AMEND-C 0221-CL.docx – jeb – 04/23/2026 
000100-01087.20210203C.FORCE-ST-AMEND-0221-CL.pdf