Successfully Adopt the New Dicamba System With These Application Best Practices

Sponsored by: WinField United

Q&A with Ryan Wolf, WinField United agronomy manager

Dicamba System

Q: How can growers and applicators best adopt the dicamba system and avoid running into issues when using this new technology?

A: When it comes to adopting the dicamba system, I have two important tips: read the label and follow the label. If that happens, I don’t think we’ll have many problems with this system.

Currently, two low-volatility herbicide products are labeled for use with dicamba-tolerant crops – XtendiMax® With VaporGrip® Technology from Monsanto and Engenia™ Herbicide from BASF. Each of these products has its own unique application requirements listed on its product label. After you’ve selected the herbicide you plan to use with your dicamba-tolerant crop, you need to thoroughly read and follow its label requirements for use. Each of them has a different set of guidelines that must be obeyed for successful use.

Q: What is unique about these labels?
A: Each dicamba product currently has two separate labels: a full Section 3 label that covers dicamba use across a range of crops, and a supplemental label covering their use in dicamba-tolerant soybeans and dicamba-tolerant cotton. It’s the supplemental labels that include highly specific usage guidelines we need to read and follow with the dicamba-tolerant soybean system.

It is important to understand the required combination of products that is listed on the two labels. Lists of adjuvants and tank-mix partners, along with approved nozzles for use with these two new products, may be accessed online at and Because the lists of products continue to change and vary between XtendiMax® With VaporGrip® Technology and Engenia™ Herbicide, users will need to consult the appropriate online listings on an ongoing basis for the most current information.

For example, with XtendiMax® With VaporGrip® Technology, an approved drift reduction agent (DRA) must be used depending on which herbicides and adjuvants are being combined. DRAs, such as AG16098 adjuvant from WinField United, are specifically designed for use with ultra- and extra-coarse nozzles, and the new dicamba herbicide chemistries.

Because label changes are continuing to be made, users are required to review the online label no more than seven days prior to making an application. Knowing current tank-mix requirements will help ensure that your application plans follow label requirements.

Q: What type of nozzles should I be using?
A: To combat off-target herbicide movement, currently more than 20 different nozzles are approved for use with XtendiMax® With VaporGrip®, while Engenia™ Herbicide allows 10 different nozzle types. All the nozzles allowed apply extra-coarse to ultra-coarse droplets to limit small particles that can easily move off-target.

Q: What other application guidelines do I need to be aware of?
A: In addition to nozzle type, the product labels for XtendiMax® With VaporGrip® Technology and Engenia™ Herbicide include detailed guidelines for application rate and speed, nozzle pressure, boom height, wind speed, adjuvant use and more. And these rules vary between the two labels.

Boom height is limited to a maximum of 24 inches above soil surface or crop canopy for both new herbicides. This boom restriction mirrors research data showing that the risk of drift drastically multiplies as boom height increases.

Both new products also require the use of a 110-foot buffer zone between the last row of sprayed soybeans and sensitive crops located downwind when using an application rate of 12.8 fluid ounces per acre of Engenia™ Herbicide or 22 ounces per acre of XtendiMax® With VaporGrip® Technology postemerged. After the wind speed changes direction, the buffer strips can also be sprayed.

Q: What precautions should I be taking when cleaning my tank?
A: After spraying is complete, a three-rinse procedure should be used to eliminate any remaining traces of dicamba in the sprayer system. Farmers should carefully follow the cleaning steps listed on each label. I also recommend rinsing the tank as soon as spraying is complete, as well as completely flushing booms and hoses. It’s never a good idea to leave dicamba in the sprayer overnight, or clean-out can become extremely difficult.

To get more information on how to best adopt these new dicamba technologies, contact your local WinField United retailer or visit

WinField is a registered trademark and WinField United is a trademark of Winfield Solutions, LLC.

VaporGrip® and XtendiMax® are trademarks of Monsanto Technology LLC.

Engenia™ is a trademark of BASF.