Mosquito Dunks, 100-Pack

Includes 5 trays of 20 dunks/tray for a total of 100 dunks.

Summit Mosquito Dunks kill mosquito larvae in standing water before they're old enough to bite. Each dunk treats 100 square feet of surface water for 30 days or more, which reduces adult mosquito populations and helps prevent mosquito-borne diseases.

They're an efficient, safe and eco-friendly addition to your mosquito control, particularly where standing water lets mosquitoes breed. Mosquito Dunks are North America's best-selling homeowner mosquito control product.

How do Mosquito Dunks work?

A dunk floats on standing water and slowly releases Bti, a bacterium that kills mosquito larvae. Each one looks like a small beige doughnut. As it slowly dissolves, it releases a long-term biological larvicide at the water's surface, which gradually settles through the water and is eaten by the larvae growing there. The Bti disrupts their digestive system and kills them before they become flying, biting, disease-carrying adults.

When female mosquitoes lay their eggs in treated water, the larvae hatch, start eating the Bti and die before they grow up. Dunks kill within hours.

The active ingredient is Bacillus thuringiensis subspecies israelensis (Bti), a naturally occurring bacterium that is toxic only to mosquito larvae. It kills the larvae of all species of mosquito, and there are approximately 2,500 species worldwide. Mosquito Dunks are the only product with Bti that lasts 30 days and treats 100 square feet of surface water.

Mosquito Bits are granules with the same active ingredient, but unlike the dunks, they release the larvicide immediately.

Are Mosquito Dunks safe around people, pets and wildlife?

Yes. Bti is very target-specific for mosquitoes and does not adversely affect other organisms in the water. It is non-toxic to humans, pets, birds, fish, wildlife and most other non-target organisms, and is harmless to other living things. The dunks are safe to use around birds, wildlife, children and pets.

• Unlike chemical insecticides, which can harm a wide range of insects and organisms, Bti targets only mosquitoes. That minimizes the impact on beneficial insects such as bees and butterflies and helps preserve the wider ecosystem.
• Even if your dog eats an entire dunk, it will not adversely affect the animal.
• The EPA has registered Mosquito Dunks for use in animal watering troughs and fish habitats.
• They are labelled for organic gardening by the US EPA and approved for organic production and gardening under the National Organic Program guidelines.
• The dunks are biodegradable.

Where can I use them?

In any standing water or water garden, or anywhere water collects and stays for a while, including:

• Ponds and koi ponds
• Water troughs
• Bird baths
• Rain barrels
• Flower pots
• Gutters
• Other containers that collect water
• Swamps and fragmented puddles
• Trash dumps that hold water
• Water with a high concentration of organic material

That range makes them suitable for both residential and commercial use. Homeowners, ranchers and farmers looking for a safe, non-toxic way to control mosquitoes can use them.

How much water does one dunk treat, and for how long?

One dunk treats 100 square feet of surface water for 30 days or more. For less water, use a portion: the dunks can be broken into smaller pieces, and you simply toss the pieces into the water, where they release Bti slowly over time. Because each dunk stays effective for about 30 days, you don't need to reapply often.

Why choose Bti over chemical insecticides?

It's an effective, low-impact way to control mosquitoes and the diseases they carry. Mosquitoes can be deadly as well as annoying, and interest in mosquito control across North America has grown with the spread of West Nile virus. By controlling mosquitoes at the larval stage, the dunks help prevent the transmission of diseases such as:

• West Nile virus
• Dengue fever
• Zika virus
• Malaria

Using the dunks also reduces your reliance on chemical insecticides, which can harm the environment and non-target organisms. And because they last so long and cut down on mosquito problems, they're a cost-effective choice.

Find them at Urban Nature Store, online and in our stores.