Mosquito Bits is the safe and natural way to limit mosquito populations in wet marshy areas or where there is standing water. The Bits are made of corn cob granules coated with Bt-israelensis (Bt-i), a bacterium that specifically targets mosquito larvae--this means that your family, your pets, and wildlife will not be affected. Sprinkle Mosquito Bits into standing water in your yard or in ornamental ponds and bird baths. The cob granules will release the larvicide that will kill any larvae in the water for one week. Add Bits bi-weekly thereafter for long-term control of mosquito larvae. One teaspoon treats 25 square feet, and one tablespoon treats 75 square feet. This product comes in a 32 ounce shaker.