Summit Chemical Company MSD11012 Summit Mosquito Dunks 6-cd B.t. Var. Israelensis
Kills mosquitoes before they become old enough to bite. Made with a natural organic ingredient. Contains no poisonous chemicals: harmless to other living things. Kills mosquito larvae for 30 days or longer. Simply leave a floating Mosquito Dunk in each place water collects around your home. Each Dunk will take care of up to 100sq ft of water surface regardless of depth.