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
Palmer amaranth has a tendency to emerge throughout the summer; and it grows very rapidly during the heat of June and July when many other species are suffering from the temperatures. Thus, it is very important to include effective herbicides… Continue Reading
Mark VanGessel, Extension Weed Specialist; mjv@udel.edu With corn harvest underway, a few things to keep in mind about Palmer amaranth and Texas panicum. A combine is a very efficient tool for spreading Palmer amaranth seeds. Take measures to prevent spreading… Continue Reading
Mark VanGessel, Extension Weed Specialist; mjv@udel.edu In my opinion, successful management of Palmer amaranth is more about when you treat it, rather than what you use. Timing is important, and plants visible above the soybean canopy will not be controlled.… 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
