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Bacillus thuringiensis israelensis

Bacillus thuringiensis subspecies israelensis, also known as Bti, is a biological control agent for larval mosquitoes. It is a bacterial disease that creates toxins that are effective in killing a few species of Diptera, including mosquitoes, while having almost no other effect on other species.

It is sold to the public under the name "Mosquito Dunks" or "Mosquito Bits." It is also available in bulk liquid or granular formulations for commercial and public agency use.