Tuesday, August 8, 2017

Here are three recent updates, all relating to weed management issues:

Assessing and documenting yield loss due to dicamba injury in soybean
by Jeff Gunsolus, Extension weed scientist

dicamba-injury-soybean
Photo 1. Leaf cupping symptoms of dicamba injury in soybean. Photo: Bruce Potter
As we enter August, the big unknown in fields presenting dicamba injury symptoms will be dicamba’s impact on soybean yield. Unfortunately, due to the sensitivity of non-Xtend soybeans to dicamba, injury symptoms are not reliable indicators of yield loss. The level of yield loss depends on exposure at vegetative or reproductive stage of growth, persistence of injury symptoms, and growing conditions post-exposure.