Quantity of (2) 20 packs: Mosquito Dunks Biological Mosquito Control. Kills Mosquitoe Larvae Before They're Old Enough To Bite, Easy To Use, Simply Place Mosquito Dunk In The Water Garden Or Any Standing Water, Keeps Working For 30 Days & More, Completely Degrades.

Any standing water can breed swarms of mosquitoes, even in your birdbath or rain barrel. Our Mosquito Dunks contain Bti (short for Bacillus thuringiensis subspecies israelensis.), a naturally occurring bacterium that kills mosquito larvae for a full 30 days. Each slow-release, floating ring treats u...