The information below contains links to various locations to provide you with additional information for the use of certain dicamba herbicide formulations. To apply Engenia, Tavium, and/or XtendiMax you must have valid pesticide certification and have attended an approved dicamba training program. Annual training is required to use the dicamba products designated for use on Dicamba Resistant crops.
Public Comment Requested 7/23/2025 for Dicamba
In regard of the May 15th dicamba rule. For May 15-October 1 dicamba rule is no longer a rule as of 2024. It was redacted from the Tennessee Pesticide Rules and Laws. Please refer to and follow all label instructions for all dicamba products and over-the-top dicamba products. If you have any questions, please contact Chad Hayes at the Tennessee Department of Agriculture email:chad.hayes@tn.gov or call 615-837-5148.
- EPA Endangered Species Bulletin (Bulletins Live Two)
- EPA Endangered Species Program Information
- 2026 Online Dicamba Training may be coming soon
- 2022 Application Guidance Information
- Dicamba Recordkeeping Form
- Latest on Dicamba released by EPA – release on 12-21-2021
- Tennessee Counties with Exceptions (search site using the product’s tradename)
- As of 1/12/2021, the following TN counties have EPA Endangered Species restrictions – Wilson, White, Bedford, Grundy, Bledsoe, Fentress, Maury, Montgomery, Polk, Marion, and Franklin
- EPA Eyes Damage from Dicamba Usage (9/14/21)
- The Use of Genetically Engineered Dicamba-Tolerant Soybean Seeds
Training
UT Extension plans to provide a 2024 Dicamba Stewardship Training which will be mandatory for all individuals who purchase, mix or apply Engenia, Tavium, XtendiMax, or other dicamba products allowed to be applied in dicamba resistant soybean or cotton varieties. The cost is expected to be $25.
A training titled, “How to Safely Use and Handle Paraquat-Containing Products” is mandatory for all individuals who purchase, mix or apply paraquat-containing herbicides. There is no charge for this training.
Locations:
- Dicamba Training Locations
- Online Dicamba Training (select under the Pesticide Safety Education Training, either private or commercial applicator)
- Contact your county Extension Office
Training Fee: $25
Tools
- Specmeters Weather Station (detect inversions)
- Sensitive Crop Registry
- Application Recordkeeping: Focus on Environmental Conditions, NDSU Extension Service
- SPOTON inversion tester by innoquest (AgWeek Press Release)
- Kestrel Wind measurement meters
- WeatherFlow measurement meters
- BASF’s Engenia Spray Tool
Helpful Hints prior to using dicamba products
1) Read the label
2) Refer to the Endangered Species Act section of the label and visit EPA’s website for endangered species. Check out Bulletins Live Two (BLT)
3) Keep records of all applications
Based on what appears in the current EPA documents, the proposed label mitigations for 2026 will include:
- No federal label cut-off dates for applications in dicamba tolerant crops (though certain crops/products may have growth stage restrictions)
- Volatility mitigations based on temperature, including no application for temperatures forecasted above 95 degrees
- Endangered Species Act runoff mitigation requirements (previously published in 2024 and utilized in recently approved new herbicides) that will be based on points, depending on farming operations
- Product application rates will remain at 0.5 lb dicamba ae per acre, with a maximum of two applications per year, on dicamba-tolerant soybeans and cotton.
- A single downwind drift buffer of 240 feet is required, though this buffer may be reduced by certain mitigations under the herbicide strategy. Do no apply if sensitive crops and/or certain plants are planted on an adjacent downwind field or area.
