Crops Editor at Successful Farming, Kansas State graduate and 4th generation Kansas farmer. My wife and I have two children.


No Silver Bullet for Pigweed, Waterhemp Control in Corn

Ah, the good old days . . . when glyphosate alone could provide effective weed control on waterhemp and palmer amaranth (both commonly called pigweeds). Not only have these weeds developed resistance to glyphosate, but they also show resistance to products with ALS, triazine, PPO, and HPPD modes of action.

So what's left? Curtis Thompson, weed specialist at Kansas State University, says glyphosate still works on many weed species and should still be in the sprayer tank, provided you use additional modes of action that will work on pigweed.