Mark VanGessel, Extension Weed Specialist; mjv@udel.edu and Kurt M. Vollmer, Postdoctoral Researcher, University of Delaware; kvollmer@udel.edu Control of Palmer amaranth in soybeans requires the right product, at the right rate, at the right time. Residual herbicides are important to slow… Continue Reading
Mark VanGessel, Extension Weed Specialist; mjv@udel.edu FYI, common ragweed and Palmer amaranth are emerged in many of the fields that have not been treated yet. So, if you have glyphosate-resistant biotypes you will need to be sure to have products… Continue Reading
Mark VanGessel, Extension Weed Specialist; mjv@udel.edu Glyphosate-resistant horseweed, Palmer amaranth, and common ragweed have all been identified in Delaware. In addition, many fields have plants of these species resistant to Group 2 herbicides; AND a few fields in the region… Continue Reading
Mark VanGessel, Extension Weed Specialist; mjv@udel.edu Options for controlling horseweed resistant to glyphosate after the soybeans have emerged are very limited. Liberty Link soybeans are an exception, because Liberty 280 is quite effective on horseweed (be sure to keep your… Continue Reading
Mark VanGessel, Extension Weed Specialist; mjv@udel.edu One of the most common questions is how to control marestail for no-till soybeans. Treating them early is the key to success. Control of marestail when its 4 to 6 inches is more likely… Continue Reading
