At the time of this article’s publication in the Agronomy eUpdate, the February existing stocks order is the last document related to dicamba registration published on the EPA website.

Now is the time to control weeds in double-crop soybeans.

Double the crop, half the weed control – that’s part of the allure of following wheat harvest with a second planting of soybeans.

Thoroughly consider the possible reasons for the symptoms before you draw conclusions. Here is a summary of the potential for herbicide injury and the associated symptoms.

The Wisconsin Cropping Systems Weed Science program has conducted several research trials investigating post-emergence weed control in XtendFlex soybean systems (dicamba-, glufosinate- and glyphosate-resistant soybean) without OTT applications of dicamba.

The study says the data show a rapid falling-off of glyphosate effectiveness against seven major weeds after the first couple of years. The authors conclude that intensive use of any one weedkiller like glyphosate year-after-year serves to speed up evolution in weeds to resist it.