With the recent EU approval of Xtendflex soybean, commercial launch will begin in 2021. In addition, the US EPA has registered 3 dicamba products (Xtendimax, Engenia, Tavium) for use through 2025. The new labels have a few new requirements. Here is a brief overview of what's new:
This is just a brief overview of some of the more significant new changes to these herbicide labels. If you plan to use these products, it is important that you thoroughly read through these labels and follow all label requirements. In addition to the new requirements listed above, other previously established requirements such as the use of nozzles that create ultra-coarse droplets, spraying when wind speeds are between 3 and 10 mph, NOT spraying during a temperature inversion, maximum boom height of 24 inches above canopy, maximum ground speed of 15 MPH, etc. must still be followed. These products remain restricted use products (RUPs) and still require special training prior to use. You will need to contact the manufacturers of these products in order to complete the 2021 dicamba certification training.
It is also important to note that glufosinate (Liberty, Interline, Cheetah, Scout) can be applied for post-emergence weed control in the Xtendflex system. However, glufosinate cannot be mixed with dicamba products according to the Engenia, Tavium, and Xtendimax labels. Glufosinate can increase dicamba volatility, resulting in greater injury to nearby sensitive plant species.
The University of Missouri Weed Science program has research results available from weed control systems in Xtendflex soybean, which can be found by selecting the 'research results' tab on our website and searching for Xtendimax, Engenia, or Tavium.
REVISED: April 12, 2021