A screw worm and ear tick spray that controls pests for up to four weeks. Controls stable flies, horse flies, deer flies, face flies, house flies, horn flies, mosquitoes, ticks and gnats. For use on wounds to kill flies and maggots, or use as a premise spray in poultry houses, animal quarters, and milk rooms. | Durvet Screw Worm Aerosol Multi-Purpose Insecticide Spray | Size 12 oz