The 'Doom Dunks' Mosquito Larvicide | Summit Slow-Release Bti Dunks 24-Pack (4 x 6-Count)

The Experience

Standing water is inevitable on a well-considered property. Birdbaths, garden ponds, rain barrels, roof gutters, drainage areas, decorative containers — every one of them is a potential mosquito nursery if left unmanaged. The Doom Dunks are the biological solution that turns standing water from a liability into a dead end for mosquito larvae, without harming a single bird, bat, fish, beneficial insect, or mammal that drinks from it. Each donut-shaped dunk floats on the water surface and slowly releases Bacillus thuringiensis israelensis — Bti — a naturally occurring soil bacterium that is lethal to mosquito and fungus gnat larvae at the cellular level and completely inert to every other organism in the food chain. One dunk treats up to 100 square feet of water surface for 30 days. Break a dunk into quarters for smaller containers, birdbaths, and bucket traps. Drop a whole dunk into a garden pond and forget about it for a month. This is pest control the way a well-considered property handles everything — working with nature rather than against it, invisibly and continuously, without chemicals, without sprays, and without a service contract.

Scientific Engineering

• Bacillus thuringiensis israelensis (Bti): The active ingredient in every Doom Dunk is Bti — a naturally occurring soil bacterium first isolated in the Negev Desert in 1976 and now recognized as the gold standard biological larvicide for mosquito control worldwide. Bti produces crystalline proteins that are toxic to mosquito and fungus gnat larvae upon ingestion, disrupting larval gut function at the cellular level and preventing emergence. It is completely harmless to birds, bats, fish, amphibians, beneficial insects, pets, and humans — including at the concentrations produced by extended slow-release exposure in standing water.
• Slow-Release Float Design: Each donut-shaped dunk is engineered to float on the water surface and release Bti continuously over a 30-day period under typical environmental conditions — providing consistent larvicidal coverage without repeated applications or ongoing management.
• 100 Square Foot Coverage Per Dunk: A single dunk treats up to 100 square feet of water surface — sufficient for garden ponds, rain barrels, and larger decorative water features. For smaller installations, dunks can be broken into sections for proportional coverage of birdbaths, flower pot saucers, roof gutters, and interior drainage locations.
• Bucket of Doom Configuration: For active perimeter mosquito control, break a dunk into quarters and place each piece in a five-gallon bucket filled halfway with water and a handful of grass clippings, dead leaves, or straw. The organic material produces the microbial scent that attracts egg-laying mosquitoes, while the Bti eliminates every larva before emergence. Replace organic material and add a fresh dunk piece every 30 days. Distribute multiple buckets in shaded areas across the property perimeter for compounding effect.
• Broad Application Range: Effective in any containerized standing water environment — birdbaths, garden ponds, rain barrels, roof gutters, flower pots, planter saucers, drainage areas, and interior drainage locations. Not for use in water intended for human consumption.

Boutique & Conservation Values

• Nature-Derived Pest Control: Bti is not a synthetic chemical — it is a naturally occurring soil organism that has been present in terrestrial ecosystems for millions of years. Its mosquito larvicidal properties were discovered, not invented. Using Doom Dunks is not applying a pesticide to your property — it is introducing a naturally occurring biological agent that targets a single life stage of a single pest category with no collateral impact on the broader ecosystem.
• Safe for Wildlife Water Sources: Every birdbath, garden pond, and water feature treated with Doom Dunks remains completely safe for every bird, bat, and beneficial insect that drinks from or forages near it — making Doom Dunks the only mosquito control product compatible with a property designed to attract and support wildlife.
• The Bucket of Doom: As featured in Midwest Nest Field Notes — "The Estate Owner's Guide to Nature's Pest Control" — the Bucket of Doom configuration turns Bti's passive larvicidal action into an active perimeter capture strategy, using the mosquito's own egg-laying behavior against it.
• Heritage Manufacturing: Proudly Made in the USA.

Specifications

• Active Ingredient: Bacillus thuringiensis subspecies israelensis, solids, spores and insecticidal toxins — 10.31%
• Inert Ingredients: 89.69%
• Coverage Per Dunk: Up to 100 sq. ft. of water surface
• Duration Per Dunk: 30 days under typical environmental conditions
• Pack Contents: 24 dunks (4 x 6-count packages)
• Application Method: Float on standing water surface
• Compatible Water Features: Birdbaths, garden ponds, rain barrels, roof gutters, flower pots, drainage areas
• Not For Use In: Water intended for human consumption
• Shipping Weight: 1 lb. (estimated)
• Country of Origin: Proudly Made in the USA