Mosquito Control BTi/Bacillus thuringiensis israelensis Powder

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. Bti is very specific for mosquitoes and black flies, and has some toxicity toward certain other dipterans (including midges). Bti is the primary material used for mosquito control because of its low toxicity to non-target species. When community mosquito control is needed to reduce mosquito-borne disease, the Department of Health favors use of larvicide applications to the breeding source of mosquitoes. Larvicides are more effective and less toxic than adult mosquito sprays, and the applications are unlikely to result in human exposure.