Description
Product Specifications
- Active Ingredient: Bacillus Thuringiensis Israelensis (BTI)
- Formulation: Slow-release larvicide dunk
- Control Method: Biological mosquito larval control
- Use Sites: Outdoor standing water
- Residual: Up to 30 days
- Manufacturer: Summit Chemical Company
- EPA Registration No.: 6218-47
How Summit Mosquito Dunks Work
Mosquitoes lay eggs in standing water. Once the eggs hatch, larvae feed on organic matter in the water.
Summit Mosquito Dunks release BTI, a naturally occurring bacterium that mosquito larvae ingest. The BTI disrupts the larvae’s digestive system, killing them before they can mature into adult mosquitoes.
This prevents future mosquito populations from developing.
How to Use Mosquito Dunks (Quick Guide)
- Place the dunk directly into standing water
- One dunk typically treats up to 100 square feet of surface water
- Allow the dunk to float or partially submerge
- Replace every 30 days as needed
- Continue use during mosquito season for ongoing prevention
Dunks can also be broken into smaller pieces for use in small containers or bird baths.
Target Pests
- Mosquito larvae
- Fungus gnat larvae in standing water (limited situations)
- Other listed fly larvae (per label)
Why Professionals & Homeowners Choose Mosquito Dunks
Unlike foggers and sprays that only kill adult mosquitoes temporarily, Summit Mosquito Dunks stop mosquitoes before they ever become flying, biting adults. This makes them one of the most effective tools for long-term mosquito prevention and Integrated Mosquito Management (IMM).



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