Mosquito Bt Floating Donuts/Dunks (Pack of 20)

Mosquito Bt Floating Donuts/Dunks (Pack of 20) provide long-lasting, eco-friendly mosquito control using Bacillus thuringiensis subspecies israelensis (BTi). Each floating dunk slowly releases the bacterium in standing water to kill mosquito larvae, black flies, and fungus gnats while remaining harmless to humans, pets, wildlife, and beneficial insects.

At a glance

• Type: Biological larvicide (floating dunks)
• Active ingredient: Bacillus thuringiensis subsp. israelensis (BTi)
• Pack size: 20 dunks
• Coverage: One dunk per 100 square feet of water surface
• Lasts about 30 days per dunk
• Safe for humans, pets, and wildlife when used as directed

Best for

• Treating ponds, rain barrels, and birdbaths
• Animal watering troughs and unused pools
• Flower pots, roof gutters, and standing water
• Targeting mosquito larvae and fungus gnats
• Long-term, low-maintenance mosquito control

How to use

Identify standing-water breeding sites, then place one dunk for every 100 square feet of water surface, either floating directly or held in a mesh bag. Each dunk stays effective for about 30 days; replace every 30 days or after heavy rainfall for sustained control. Avoid applying to drinking water sources, and wash thoroughly after handling.

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Grow Organic supplies natural pest control and garden essentials to help growers manage pests safely and sustainably.