Use Summit Mosquito Dunks in ponds or standing water to kill mosquitoes and black fly larvae for 30 days or more

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Brass valves and rubber seal produce a positive water shut-off

SUMMIT MOSQUITO DUNKS Brand_Cargill Use Summit Mosquito Dunks inUse Summit Mosquito Dunks in ponds or standing water to kill mosquitoes and black fly larvae for 30 days or more. While the Mosquito Dunks float, they slowly release a long term biological mosquito larvicide, BTI, killing the larvae before they hatch into adults. This biological mosquito control is safe for use around children, fish, pets or wildlife. Treats up to 100 square foot of water surface.