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Bite Shield

Mosquito Dunks®

Kills Mosquitoes Before They're Old Enough to Bite!


* Due to the nature of this product, Mosquito Dunks can only be returned if they are unopened.

Mosquito Dunks are a highly effective, low impact product

Kills Mosquitoes before They're Old Enough to Bite! The Mosquito Dunks are America's best selling homeowner mosquito control product. The only product with BTI, a bacteria toxic only to mosquito larvae. Lasts for 30 days and treats approximately 9 square metres 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 and lasts for 30 days or more
  • Labeled For Organic Gardening by the US EPA

Summit Chemical Company has been involved in mosquito control for over 50 years. Their best selling Mosquito Dunks were initially developed for the professional mosquito control industry as a biodegradable formulation aimed at low impact application to any body of water.

Frequently Asked Questions About Mosquito Dunks

Mosquitoes have always been an annoying and sometimes deadly aspect of summer. With the recent spread of West Nile virus there has been a heightened interest in mosquito control throughout the United States. Homeowners, ranchers and farmers looking for a safe, nontoxic way to control mosquitoes can use Mosquito Dunks, which kill mosquitoes before they can become flying, biting, disease-carrying adults.

What is a Mosquito Dunk?

A Mosquito Dunk looks like a small, beige donut which floats on standing water. As the Dunk slowly dissolves, it releases a bacterium which is toxic to all species of mosquito larvae.

What is the active ingredient in Mosquito Dunks?

The active ingredient in Mosquito Dunks is Bacillus Thuringiensis subspecies Israelensis (BTI). BTI is a bacterium that is deadly to mosquito larvae but harmless to other living things.

Where should Mosquito Dunks be used?

Just float a biodegradable Mosquito Dunk in water troughs, Koi ponds, bird baths, rain barrels or any place where water collects and remains for periods of time. When female mosquitoes lay their eggs in standing water treated with a Mosquito Dunk, the larvae will hatch and begin to eat the BTI. The BTI will kill the mosquito larvae before they can grow up to become biting and disease-spreading adults.

How do Mosquito Dunks work?

While floating, a Mosquito Dunk slowly releases a long-term biological mosquito larvicide at the water’s surface. This larvicide gradually settles in the water, and while it travels through the water it is eaten by the mosquito larvae growing there.

What kinds of mosquito larvae will a Mosquito Dunk kill?

There are approximately 2,500 species of mosquitoes throughout the world. The BTI in Mosquito Dunks will kill the larvae of ALL SPECIES of mosquitoes.

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