Earlier this week NAAA submitted two letters to the EPA with comments regarding the proposed registration of two new herbicides, diflufenican and trifludimoxazin. Diflufenican is a preplant and preemergence herbicide intended to provide control of waterhemp, Palmer amaranth, and other pigweed species. It will be labeled only for corn and soybeans, but aerial application will not be allowed. NAAA objected, acknowledging that while aerial applications of preplant and preemergence herbicides are not common, there are times when wet soils prevent growers from using ground rigs.