Arkansas's pesticide regulators have stepped into the middle of an epic battle between weeds and chemicals, which has now morphed into a battle between farmers. Hundreds of farmers say their crops have been damaged by a weedkiller that was sprayed on neighboring fields. Today, the Arkansas Plant Board voted to impose an unprecedented ban on that chemical.
The tension — which even led to a farmer's murder — is over a weedkiller called dicamba. The chemical only became a practical option for farmers a few years ago, when Monsanto created soybean and cotton plants that were genetically modified to survive it. Farmers who planted these new seeds could use dicamba to kill weeds without harming their crops.
The problem is, dicamba is a menace to other crops nearby. It drifts easily in the wind, and traditional soybeans are incredibly sensitive to it. "Nobody was quite prepared, despite extensive training, for just how sensitive beans were to dicamba," says Bob Scott, a specialist on weeds with the University of Arkansas's agricultural extension service.