5 Tips for Dicamba Application

May 29, 2018
Ryan Ponwith
Master Field Sales Agronomist
Dicamba is a valuable technology in your tool box to control tough weeds and ensure high-end yield potential. We know that dicamba is a much-needed chemistry to combat resistant weeds, and that it must be managed very carefully to achieve success in the field. How can you assure that you have exceptional dicamba applications this season? See below for 5 key tips for applying dicamba:

Use extra water volume when spraying dicamba. Spraying with 20 GPA is critical to improve coverage when using coarse nozzles that increase droplet size.

Use only label-approved nozzles and tank mix partners to ensure proper applications. Visit for a list of approved nozzles and tank-mix partners. For best results, use a TTI nozzle with OnTarget™ drift reduction agent.

The new label requires dicamba application between 3 and 10 MPH. Wind below 3 MPH can be problematic in determining where vapor particles might move.

Soybeans are extremely sensitive to dicamba, making incredibly low rates of chemical cause visual injury symptoms. Check with neighbors to determine where susceptible crops may be in your area. 


Ammonium sulfate and other ammonium-based additives are prohibited in tank-mixes with dicamba. AMS greatly increases the volatility of dicamba products when added to the tank.

Use Class Act® Ridion™ water conditioner for new dicamba based herbicide technologies. Class Act® Ridion™ ties up harmful cations without AMS, without adversely affecting volatility of dicamba, all while increasing absorption and optimizing weed control with the power of CornSorb™ technology.

Do you have a backup plan if you are unable to apply dicamba this year? Strict label requirements drastically limit the amount of time available to spray dicamba. A study by South Dakota State University evaluated how much time was available to spray dicamba during 2017 with the new 2018 label requirements. In May, just 10% of total time was available for dicamba applications; in June, only 5% was available. The state of Minnesota has special guidelines that cut off dicamba applications above 86 degrees, and with a final application deadline of June 20.

Follow these steps to make weed control a success this year. For additional questions on label requirements, contact your UFC Field Sales Agronomist.