Prevents fly larvae from developing into flies, using larvicide cyromazine. Because it does not directly kill adult flies, the decrease in fly populations occurs gradually and becomes visible within 1 to 2 weeks after initial application. Repeat every 3 to 4 weeks during fly season to keep each subsequent generation of flies from developing. Mix 1 lb. granules per 1 gallon water to treat 200 sq. ft. Spray or scatter granules on all areas where manure, spilled feed and/or moisture accumulate, including barn and stall floors. Neporex 2SG does not kill beneficial bugs or fly predators, and can be used in conjunction with them and/or insecticides.