Dipteracide (ADM methoprene) is the most cost-effective method to rid cattle herds of pesky, profit-robbing horn flies. Incorporating Dipteracide into cattle diets is not only easy, but highly effective. Cows become the applicator by consuming feed-through methoprene, which acts by inhibiting the development of horn fly larvae into adults. When considering the efficacy, cost and convenience of a horn fly control program, Dipteracide becomes the obvious solution to a pesky, high dollar problem.