(NAFB.com) – Leaders of the National Corn Growers Association expressed disappointment with a decision by the International Trade Commission affirming that Corteva Agriscience was harmed by imports of a critical herbicide called 2,4-D. This decision means that duties will be placed on imports of the herbicide at a final rate determined later by the U.S. Department of Commerce. “We are concerned and alarmed by this ruling,” says Illinois farmer and National Corn Growers Association President Kenneth Hartman Jr. “Corn growers should not be forced to rely exclusively on one domestic supplier, and today’s decision threatens to cause significant availability shortages for 2,4-D.” Shortages will hamper the work of U.S. farmers, who are already facing a tough environment due to a prolonged period of high input costs and low prices. The herbicide 2,4-D is a growth regulator that targets broadleaf weeds, which are particularly challenging weeds for corn growers to manage.