Source: Penn State Extension, D. Lingenfelter
Penn State weed science extension along with other university weed scientists recommend using dicamba (Xtendimax, Engenia, FeXapan) primarily for burndown in “full-season” Xtend soybeans. In-crop or post applications as well as, burndown in double-crop soybeans can be risky. Post applications usually occur when many sensitive crops are very susceptible to dicamba and weather conditions favor dicamba drift. However, if post applications must be used for controlling problem weeds such as Palmer amaranth, escaped marestail, or persistent perennials, make sure to use caution and be aware of surrounding crops and sensitive areas. The applicator is responsible for drift and its consequences.
Assuming you have taken the proper training, here is a primary checklist of things to consider if you must apply an approved dicamba product in Xtend soybeans at this time of year:
Refer to their labels and websites for additional information and updates online by Monsanto, by BASF, and by DuPont.