Updated On

April 29, 2024

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    Mosquito dunks are a special type of biological mosquito control. The dunk is a mosquito shaped mosquito product equipped with bacillus thuringiensis israelensis or BTI.

    The active ingredient BTI of mosquito dunks is a larvicide which targets and kills mosquito larvae in treated areas.

    Mosquito dunks can be applied on all forms of standing water surrounding one’s property. It is safe to use because it doesn’t harm birds, fishes, wildlife, and pets.

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    How Do Mosquito Dunks Work?

    As mentioned earlier, mosquito dunk is a type of biological mosquito control. The entire disc shaped dunk with a hole at the center is a compacted bacteria called Bacillus thuringiencis israelensis, otherwise known as BTI.

    The larvicide component of the dunk is a special type of larvicide that targets mosquito larvae. When dipped into the the water, the dunk stays afloat slowly dissolving and eventually releasing the naturally occuring bacteria.

    The mosquito larvae then feeds on the larvicide and dies within hours. The dunk is developed to float since mosquito larvae are typically found on the surface of the water.

    The bacteria is known to kill the larvae of all 3,000+ species of mosquitoes but are harmless to fishes, frogs, birds, wildlife, and pets. A single dunk can last for up to 30 days providing an entire month or so of protection.

    Are Mosquito Dunks Effective?


    Mosquito dunks are 100% effective in killing mosquito larvae. It can also even work on fungus gnats and black flies. Just make sure that you are treating stagnant water instead of a flowing one.

    On the contrary, mosquito dunks are safe to humans, birds, fishes, frogs, and other wildlife. Dunks are effective in getting rid of mosquito larvae on ponds, swimming pools, creeks, swamps, rain gutters, barrels or pots with collected rainwater, and water puddles.

    A single mosquito dunk can cover an area of 100 square feet. These dunks can also be broken down into tinier portions to be used on smaller bodies of standing water.

    Are Mosquito Dunks Safe Around Children and Pets?


    As discussed earlier, the naturally occurring bacteria present in mosquito dunks targets mosquito larvae alone. BTI should not pose any level health risk to humans on swimming pools with dunks or to any aquatic or wildlife animals living in and around ponds, swamps, or creeks treated with the said natural larvicide.

    And since the larvicide is technically a naturally occurring bacteria that categorically targets mosquito larvae, mosquito dunks are 100% safe to use around children and pets. In fact, the EPA has recognized mosquito dunks as safe to use on animal watering troughs and bird baths.

    Today’s Homeowner Tips

    If you do think you have a serious case of mosquito infestation, we highly recommend first consulting with an exterminator before using sprays or any other method of mosquito control. Improper use can and will make your mosquito problem worse. Click here to check out our rankings for top exterminators.

    Top 5 Best Mosquito Dunks

    If you want to get rid of those annoying and disease-carrying mosquitoes, the mosquito dunks below should help. If you already have mosquitoes, our recommendation would be to consult a professional to handle your infestation problem.

    Let’s get into our top picks!

    1. Summit Mosquito Dunks 1 Case 100 Dunks (our top pick)
    2. Gardener’s Supply Company Mosquito Control Rings (a close second)
    3. 2-Pack Summit Mosquito Dunks
    4. Bactimos Mosquito Control Dunks
    5. Mosquito Dunks by Summit 6

    Summit Mosquito Dunks 1 Case 100 Dunks

    Summit is one of the most trusted names in mosquito control products. It has been in the industry for more than 50.

    Their patented mosquito dunk has been their best selling product. Dunks have been very successful in targeting mosquito larvae. These dunks can also be used indoors to rid your home of drain flies or psychodid flies.

    Summit mosquito dunks are very much effective on birdbaths, unused swimming pools, ponds, sump pumps, flooded basements, rainwater barrels, and virtually anything that can collect and accommodate stagnant water such as tree holes, flower pots, and clogged roof gutters.

    Each mosquito dunk can cover an area of 100 square feet. You can cut or break the dunk in smaller proportions if you are planning to use it on flower pots, gutters, and the likes. Each card contains 20 dunks and each case has 5 cards.

    Targets mosquitoes and drain flies
    Effective on all forms of standing water
    Children and pet safe
    Doesn’t harm birds, aquatic and wildlife animals
    Doesn’t work on adult mosquitoes

    Gardener’s Supply Company Mosquito Control Rings

    Basically, these mosquito control rings works in the same way mosquito dunks do. It has a slow disintegration mechanism,  gradually releasing BTI lasting up to one full month.

    Each mosquito control ring can protect 100 square foot area for 30 days or more. You can use these on all types of standing water, indoors and outdoors.

    However, in the eyes of other animals, the floating rings can be quite tempting. To avoid having these rings eaten or moved around by wildlife, it is best to tie them or anchor them down with something.

    Targets larvae of all mosquito species
    Lasts for 30 days
    Safe for everyone except for mosquitoes
    Can be easily eaten by passing animals
    Doesn’t kill adult mosquitoes

    2-Pack Summit Mosquito Dunks

    These dunks are the same Summit mosquito dunks that we reviewed earlier. The only difference is that this is the smaller bundle variation. It’s a 2-pack bundle with each pack containing 6 dunks.

    To make the long story short, it’s the same dunk that you can use on all types of free standing water. Each dunk can cover a hundred square foot area for one full month. Safe for everyone except for mosquito larvae.

    Organic mosquito larvae control
    Each dunk can last up to 30 days
    Covers 100 square foot area
    Safe for children, pets, birds, aquatic, and wildlife animals
    Works only on mosquito larvae

    Bactimos Mosquito Control Dunks

    Bactimos mosquito control dunks are pretty much the same with the ones we reviewed earlier. It contains 10.31% BTI gradually released in sustained levels.

    You can use these mosquito control dunks outdoors on swamps, unused swimming pools, ponds, and birdbaths. Indoors, you can break these dunks into smaller portions for flooded basements and sump pumps.

    Like any other mosquito control dunk, this product is ready to use. Simply identify target areas with known mosquito larvae activity and place dunks appropriately. The dunks will stay afloat and slowly disintegrate within one month.

    Sustained-release BTI
    Lasts for 30 days
    Covers 100 square foot area for each dunk
    Ready to use on all forms of standing water
    Can’t be used to control adult mosquitoes

    Mosquito Dunks by Summit 6

    This one is another bundle of mosquito dunks by Summit. As mentioned earlier, these dunks are an organic type of larvicide geared with BTI.

    The dunks are safe to use on fish habitats and animal watering troughs. Break them down into tinier portions so you can use them on smaller forms of standing water such as rain water collected on roof gutters, unused swimming pools, old tires, and flower pots.

    This is a one pack bundle with 6 individual dunks. This option is ideal for first-time buyers.

    Organic larvicide
    Safe to use on fish habitats and animal watering troughs
    Covers 100 square foot area for one full month
    Can’t be used to control adult mosquitoes

    Think you might need professional help with your mosquito problem? Use the form below to connect with local pest control pros:

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    Editorial Contributors
    avatar for Ed Spicer

    Ed Spicer

    Ed has been working in the pest control industry for years helping 1,000's of homeowners navigate the world of insect and rodent management.

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