As Roundup herbicide and Roundup-tolerant GM crops become increasingly obsolete, the biotech industry has been trying to move 'forward' with a 'new' package: the antiquated broadleaf herbicide dicamba and dicamba-tolerant GM crops.
Back in 1994, some 5.7 million pounds of dicamba were used annually in US agriculture, almost all of it on corn. It was already well-established that dicamba is prone to drift during spraying, especially in hot weather, and that it's a persistent environmental contaminant. "Since dicamba can damage or kill most broad leaved plants, any unintended exposure can have important consequences. These effects have been studied mostly in agriculture and little is known about impacts on native plants" (Cox). A quarter of a century on, the situation isn't much different.