# 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