Bacillus thuringiensis israelensis (Bti) is a naturally occurring soil bacterium that can effectively kill mosquito larvae present in water. It is one of many strains of Bacillus thuringiensis, each having unique toxicity characteristics. While this small organism is a bacterium that affects the stomach lining of mosquitoes, black flies, and fungus gnats rather than that of caterpillars or worms. The larvae of these insects eat the BTI and it kills them before they have a chance to hatch into flying pests
When it comes to fighting mosquitoes and black flies, BTI pest control is probably the safest method for property with food crops and frequent human use. Unlike other methods of insect control, BTI has no dangerous chemicals, doesn’t interact with any mammals, fish or plants and is targeted directly at just a few insects. Using BTI on plants is in keeping with organic gardening methods, and it degrades quickly, leaving no residue.