Summit Chemical formulated their Mosquito Bits granules to kill mosquitoes within hours. Just sprinkle onto the surface of standing water. As it dissolves, it releases the natural bacterium BTI. BTI eats any mosquito larvae, regardless of species. The United States EPA approves Mosquito Bits for organic gardening in all 50 states. While BTI eliminates mosquitoes, it causes no harm to humans, pets, fish, or other wildlife. One teaspoon of Mosquito Bits treats 25 square feet of surface area. Store unused granules indefinitely. Mosquitoes can transmit many diseases. They use any source of standing water to reproduce; this includes water troughs, koi ponds, bird baths, and rain barrels.