During the Wild World of Weeds workshop, North Dakota State University weed scientist Kirk Howatt answered questions on the latest weed control methods. In small grains and row crops, Howatt’s research is confirming antagonism between the broadleaf herbicides and the grass herbicides. “We see that in trying to control volunteer corn. It’s a larger plant, a little more difficult to control. Some of the herbicides we use for broadleaf weed control can reduce the activity of the grass herbicides,” explained Howatt. “We found in our research you needed to use the highest labeled rates of the grass herbicides in the Enlist or Xtend systems to overcome the antagonism of 2,4 – D or dicamba on the grass herbicide.”
