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Backyard Review

Patio & Comfort · Summit

Mosquito Dunks (Bti)

Cheap, targeted control for standing water.

Price tier 1 of 4:Under $150Compare saved products →

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Mosquito Dunks (Bti) at a glance

What we like

  • Kills mosquito larvae in standing water
  • Inexpensive and easy to use
  • Considered safe for pets and wildlife when used as directed

Trade-offs

  • Only works where water collects — it doesn't help with adult mosquitoes
  • Needs to be replaced periodically
Best for
Rain barrels, birdbaths, ponds and low spots.
Skip it if
Your problem is adult mosquitoes and there's no standing water to treat.
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We haven't confirmed hard specs for this product on the maker's own page, so it's described at the product-line level. Check current specs and sizes before you buy. This is research-based, not a hands-on review. See how we pick products.

Where it appears in our guides

  • Best low-cost prevention

    Best Mosquito Control for Yards

    Bti-based dunks kill mosquito larvae in standing water — rain barrels, birdbaths, ponds and low spots. They're inexpensive and work only where water collects, so they don't help with adult mosquitoes already flying.

    Guide updated · Read the full guide

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Other products that show up alongside it in our guides.