Summit Mosquito Dunks Insect Repellent Solid For Mosquitoes 3.7 ozKills mosquitoes before theyre old enough to bite. The mosquito dunks are America's best selling home owner mosquito control product. The only product with bit, a bacteria toxic only to mosquito larvae, that lasts 30 days and treats 100 square feet of surface water. Non toxic to all other wildlife, pets, fish and humans Simply apply Mosquito Dunks to any standing water or water garden Kills within hours lasts for 30 days or more Highly effective low