Mosquito Bits® is a biological insecticide (BTI) that kills the larvae of mosquitoes that transmit West Nile Virus, Zika Virus, and Dengue Fever. Spread over standing water where it will kill larvae within 24 hours. Re-apply every 7 - 14 days. Use in areas that contain aquatic life, fish and plants. Perfect to use on fallen leaves, swampy areas, and vehicle tracks in turf. Sprinkle over bromeliads, pitcher plants, or any water holding plant. Harmless to plants, pets, beneficial insects, fish or wildlife. Mosquito Bits® are also approved and labeled as a biological control for fungus gnat larvae in planters and soils. Kills fungus gnat larvae in soil without synthetic toxins.