Mosquito Bt Floating Donuts/Dunks
Best eco-friendly solution for homeowners managing standing water mosquito populations.
Effectively manage mosquito populations with Grow Organic Mosquito Bt Floating Donuts/Dunks. These dunks use Bacillus thuringiensis subspecies israelensis (Bt), a natural bacterium, to target and eliminate mosquito larvae in standing water, preventing them from developing into biting adults. This eco-friendly solution is safe for beneficial insects, wildlife, pets, and humans. The slow-release formulation offers long-lasting protection for up to 30 days, making them ideal for ponds, rain barrels, and other water features. Simply place one dunk in any standing water area for convenient, targeted pest management.
$25.99
Owner Satisfaction
4.6
/ 5
Category Rank
357
/ 1717
#357 in Pesticides
Price vs Category Average
-42%
Below average
Active Ingredient
Bacillus thuringiensis subspecies israelensis (Bt)
/ Bacillus thuringiensis subspecies israelensis (Bt)
Who it's for
- Organic growers maintaining sensitive, chemical-free ecosystems
- Eco-conscious gardeners protecting pets and beneficial pollinators
- Busy homeowners wanting low-maintenance, long-term mosquito prevention
Who should skip it
- Budget-focused buyers managing large ponds or extensive drainage areas
- People needing immediate relief from active, flying adult mosquitoes
- Property owners with fast-moving streams or frequently drying water sources
Performance breakdown
Larvicidal Efficacy
Bt effectively disrupts the mosquito life cycle before maturity is reached.
Ease of Application
Simply drop the donut into standing water for immediate, hands-off protection.
Environmental Safety
Natural formula keeps pets, wildlife, and beneficial insects completely out of harm.
Treatment Longevity
Slow-release design provides consistent coverage for a full thirty-day window.
Versatility of Use
Works reliably across diverse water features from rain barrels to ponds.
Target Specificity
Precision action targets mosquito and fungus gnat larvae without collateral damage.
Key Specs
Active Ingredient
Bacillus thuringiensis subspecies israelensis (Bt)
Quantity
20 dunks per pack
Efficacy Duration
Up to 30 days per dunk
Application Rate
1 dunk per 100 sq. ft. of water surface
Form
Doughnut-shaped tablet
Target Organisms
Mosquito larvae and fungus gnat larvae
Mode of Action
Larvicidal bacterium
Pesticide Type
Larvicide
Features
- Kills mosquito larvae before they mature
- Naturally derived active ingredient (Bt)
- Safe for pets and wildlife
- Long-lasting control up to 30 days
- Easy to use, just place in water
- Targets larvae in ponds and rain barrels
- Environmentally friendly pest control
- Disrupts the mosquito life cycle
What customers say
Mosquito Bt Floating Donuts are consistently praised for their remarkable ease of use and reliable results. Simply dropping a donut into standing water provides long lasting mosquito larvae control. Users appreciate that the product is effective without harming pets or beneficial insects. This reliability makes the donuts a highly valued solution for managing backyard water features and preventing breeding grounds. Consumers feel confident in this simple, nontoxic approach to pest management, making it a trusted choice for a mosquito free environment.
Know before you buy
The dunks contain Bacillus thuringiensis israelensis (Bti), a naturally occurring bacterium. When mosquito larvae ingest the bacteria, it produces proteins that specifically target and eliminate them before they can mature into biting adults.
Yes. The active ingredient is highly selective and targets only mosquito and fungus gnat larvae. It is non-toxic to humans, pets, birds, fish, and other beneficial wildlife.
The application rate is one dunk per 100 square feet of water surface area. If your pond is smaller than 100 square feet, you can break a dunk into smaller pieces to treat the area effectively.
Each dunk provides up to 30 days of protection. For continuous control throughout the mosquito season, replace the dunks once a month.
Absolutely. Because the Bti is safe for plants and soil, these dunks are an excellent way to prevent mosquitoes from breeding in rain barrels without affecting the quality of the water for your garden.
No. These dunks are strictly a larvicide, meaning they only work on the immature stage of the mosquito life cycle. They will not kill or repel adult mosquitoes that are already flying.
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$26