Mark VanGessel, Extension Weed Specialist; mjv@udel.edu Evaluating herbicides for activity under drought stress is something we have limited data on. We know that all types of plant stress can reduce herbicide activity and drought stress is no different. But we… Continue Reading
Mark VanGessel, Extension Weed Specialist; mjv@udel.edu E3 soybeans are bred to be resistant to 2,4-D choline (Enlist), a special formulation of 2,4-D developed to minimize volatility. Meaning that these soybeans will not be injured when treated with 2,4-D choline at… Continue Reading
Mark VanGessel, Extension Weed Specialist; mjv@udel.edu I suspect all have heard about the need for preventing Palmer amaranth seeds from entering the soil and preventing seed production to stop the spread of seed with the combine. A few questions have… Continue Reading
Mark VanGessel, Extension Weed Specialist; mjv@udel.edu There have been a few calls about late season weed control in corn. Our HPPD herbicides (Callisto, Laudis, Capreno, Impact, Armezon, Shieldex) all need some atrazine with them for control and are not very… Continue Reading
Mark VanGessel, Extension Weed Specialist; mjv@udel.edu Fields with a history of Palmer amaranth (or in close proximity to fields with Palmer amaranth issues) should be scouted for postemergence applications. Postemergence control with the Group 27 herbicides, which include Callisto/Halex GT… Continue Reading
