Mark VanGessel, Extension Weed Specialist; mjv@udel.edu When you consider weed control, do you immediately consider herbicides and nothing else? That is common given we have come to rely upon crops that can be sprayed with broad-spectrum herbicides. We have become… Continue Reading
Mark VanGessel, Extension Weed Specialist; mjv@udel.edu On June 8, EPA issued a ruling to allow use of existing stocks of dicamba on soybeans. Read DE Department of Agriculture press release here https://news.delaware.gov/2020/06/09/delaware-growers-allowed-to-use-up-existing-dicamba-stock/. Dicamba that was in the possession of commercial… Continue Reading
Mark VanGessel, Extension Weed Specialist; mjv@udel.edu Horseweed (or marestail) can be challenging to control in soybeans, but planning ahead can improve horseweed control. The biggest reason for poor horseweed control is treating large plants. Horseweed over 4 to 5 inches… 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
