dicamba Dicamba Has Been Around For Years. Why Would It Now Be Causing Problems? By Kristofor Husted • Sep 8, 2017 The herbicide dicamba is thought to have been the culprit in more than 3 million acres of damaged soybeans across the country, destroying plants and leaving farmers out millions of dollars in crops. The chemical has been in use for decades, so why is it today apparently causing farms so much damage? Missouri & Arkansas Suspend Sales of Controversial Pesticide Dicamba By Kristofor Husted • Jul 7, 2017 Amy Mayer/Harvest Public Media The Missouri Department of Agriculture on Friday announced a temporary ban on the sale of agricultural products containing the pesticide dicamba, following a similar step by regulators in Arkansas.