More than a decade of continual use of glyphosate on glyphosate-resistant corn and soybeans has created weed resistance problems. Currently, scientists have identified nine glyphosate-resistant weed biotypes in the United States, including horseweed (marestail), giant ragweed, common ragweed, Palmer amaranth and waterhemp. Growers now seed crop protection strategies to handle resistant weeds and prevent further resistance problems.
More than a decade of continual use of glyphosate on glyphosate-resistant corn and soybeans has created weed resistance problems. Currently, scientists have identified nine glyphosate-resistant weed biotypes in the United States, including horseweed (marestail), giant ragweed, common ragweed, Palmer amaranth and waterhemp. Growers now seed crop protection strategies to handle resistant weeds and prevent further resistance problems. 
