Description ProzapÂ's LarvaGuard is a convenient, easy to use granule designed to provide 30 day control of mosquito larva in containerized water - the ideal mosquito breeding site. The use of methoprene inhibits mosquito larva from developing into breeding, biting adults. Slow release granules sink to the bottom and provide treatment of the entire column of water, not just the surface.Ideal for use in containerized water gardens, ornamental ponds, clogged rain gutters, old tires, bird baths, livestock/horse watering troughs and other areas of standing water. Safe for livestock, pets, fish, and birds.Purpose:Stop the Cycle with Prozapâs LarvaGuard Mosquito Larvicide Granule. Ideal for the Home, Garden, Farm or Ranch and designed to control mosquitoes at the breeding site through the use of methoprene, an insect growth regulator. Ideal for use in containerized water gardens, ornamental ponds, clogged rain gutters, old tires, bird baths, livestock/ horse watering troughs and others areas of standing water. Safe for livestock, pets, fish and birds.Description:LarvaGuard is a convenient, easy to use granule designed to provide 30 day control of mosquito larva in containerized water- the ideal mosquito breeding site. The use of methoprene inhibits mosquito larva from developing into breeding, biting adults. Slow release granules sink to the bottom and provide treatment of the entire column of water, not just the surface.Application:Measure and then sprinkle the appropriate amount of Prozap LarvaGuard Mosquito Larvicide Granules evenly over the surface of the water to be treated. Measure the surface area of the water and follow the Application Rates table for the appropriate amount of product