(Novartis Animal Health) 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 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.