Mosquito Dunks®

Mosquito Dunks® stop mosquitoes where they breed — in standing water — by releasing a biological larvicide that kills larvae before they ever become biting adults. The active ingredient is Bti (Bacillus thuringiensis israelensis), a naturally occurring soil bacteria that’s toxic to mosquito larvae but completely harmless to people, pets, fish, birds, and beneficial insects. Float them in any standing water around the home and garden: birdbaths, flowerpots, rain barrels, roof gutters, old tires, and anywhere else water collects. Each Dunk keeps working for 30 days or longer.

Kill Larvae Before They Become Biting Adults

Mosquito control is most effective at the source — the standing water where mosquitoes breed. Mosquito Dunks® target the larval stage before it can develop into the flying, biting adults that make outdoor time miserable. By interrupting the mosquito life cycle at its most vulnerable point, a single Dunk floating in a birdbath or rain barrel eliminates the generation of mosquitoes that would otherwise emerge from that water source over the following weeks.

Bti — A Natural Biological Larvicide

The Bti active ingredient is what makes Mosquito Dunks® both effective and uniquely safe. Bacillus thuringiensis israelensis is a naturally occurring soil bacteria with a long history of safe use in mosquito control programs worldwide. It’s specifically toxic to mosquito and fungus gnat larvae through a biological mechanism that affects only certain fly larvae — completely harmless to people, pets, fish, birds, and beneficial insects including bees. Safe to use in fish habitats and water gardens without any concern for aquatic life.

30 Days Per Dunk — Float and Forget

Each Dunk floats on the water surface and slowly releases the Bti larvicide over 30 days or longer under typical conditions. No mixing, no measuring, no special equipment — place the Dunk in standing water and let it work. For seasonal water sources like rain barrels and birdbaths that refill regularly, simply replace the Dunk once a month to maintain continuous protection through the mosquito season.

Why Growers Choose Mosquito Dunks®

• Kills larvae before they become biting adults — control at the breeding source
• Bti biological active ingredient — naturally occurring, non-toxic to people, pets, and fish
• Safe in fish habitats and water gardens — no harm to aquatic life
• 30 days per Dunk — long-lasting protection with minimal maintenance
• Works in birdbaths, rain barrels, gutters, flowerpots, and more — anywhere water collects
• No mixing or measuring — float and let it work

Always read and follow label directions:
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