Auxin Herbicides: What Should I Know?

The use of the auxin herbicides 2,4-D and dicamba continue to be a focal point of conversation as we develop plans for tackling herbicide-resistant weeds.  The popular, although not positive, discussion over the last several years has been on the off-target movement of dicamba.  Recent research sheds new light on some of the factors contributing to either primary and secondary drift of dicamba and the resulting injury to sensitive soybean.  Furthermore, the commercialization of soybean varieties with multiple herbicide resistance traits enables herbicide combinations that have not been previously used in soybean, with some of these herbicide combinations being more practical or effective for successful weed management.