Dicamba Herbicide Information

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

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 or he may be emailed at: chad.hayes@tn.gov or call 615-837-5148.


Training

In the event Dicamba products are allowed to be used on dicamba resistant crops become registered for use in 2026, UT Extension plans to provide a 2026 Dicamba Stewardship Training which will be mandatory for all individuals who purchase, mix or apply Engenia, Tavium, XtendiMax, or other dicamba products labeled for use on 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 on Syngenta’s web site, however Extension offices plan to provide a presentation that would apply as valid training and applicators would also receive 1 CEU certification credit for attending and passing the required exam,

Locations:

Training Fee: $25


Tools

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.