“Millions of acres of farmland in the U.S. have been affected by herbicide-resistant weeds, rendering some fields unable to be farmed. And the problem is spreading, which could mean more lost crops and lost profits,” stated a PBS NEWSHOUR special aired November 14, 2014.
Though the special focused on chemicals that rely on the chemical glyphosate, which genetically modified corn, soybean and cotton seeds were developed to withstand, without careful use of all herbicides weed resistance will likely pop-up among other crops and chemicals too.