Comments on Dicamba-Resistant Soybeans

Mark VanGessel, Extension Weed Specialist; mjv@udel.edu

Dicamba-resistant soybeans have been planted in the region, many without intending to spray with the low-volatility formulations of dicamba. If you have planted these soybeans and intend to spray with Xtendimax, Engenia, or Fexapan, be sure you have read and fully understand the labels; the labels are very specific. A few items to remember:

  • Refer to the various websites for most up to date tankmixes, adjuvants, nozzles, and requirements for drift aids

› www.engeniatankmix.com

› www.xtendimaxapplicationrequirements.com

› http://www.dupont.com/products-and-services/crop-protection/soybean-protection/articles/tank-mix.html

  • While these products have reduced drift and volatility potential, the active ingredient is the same; and if it comes in contact with susceptible plants, injury can be severe
  • As temperature increases, the risk for off-target movement also increases
  • These products will not control large weeds, labels recommend application to weeds 4 inches or less in height
  • Be a good neighbor, when in doubt leave it out
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