Summit Chemical Mosquito Dunks 20-pack - Summit Chemical 111-5. Mosquito dunks float on water and will keep on working for 30 days or longer under typical environmental conditions. While floating, they slowly release a long-term, biological mosquito larvicide at the waters surface. This larvicide gradually settles in the water where it is eaten by mosquito larvae growing there. Mosquito Dunks may be used in all types of standing water sites where mosquito larvae grow. Alternate wetting and drying will not reduce their effectiveness. Use one Mosquito Dunk for up to 100 square feet of water surface, regardless of depth. They can be used whole or broken into portions and applied to containerized standing water found near the home such as animal watering troughs, bird baths, flower pots, roof gutters, and water gardens. To prevent them from being washed away, the Dunks can be anchored using a string tied through the center hole, or they can be staked in place.Features: Summit Chemical Mosquito Dunks 20-pack - Summit Chemical 111-5. Mosquito dunks float on water and will keep on working for 30 days or longer under typical environmental conditions. While floating, they slowly release a long-term, biological mosquito larvicide at the waters surface. This larvicide gradually settles in the water where it is eaten by mosquito larvae growing there. Mosquito Dunks may be used in all types of standing water sites where mosquito larvae grow. Alternate wetting and drying will not reduce their effectiveness. Use one Mosquito Dunk for up to 100 square feet of water surface, regardless of depth. They can be used whole or broken into portions and applied to containerized standing water found near the home such as animal watering troughs, bird baths, flower pots, roof gutters, and water gardens. To prevent them from being washed away, the Dunks can be anchored using a string tied through the center hole, or they can be staked in place. Warning:Hazards to Humans: Avoid conta -- Outdoor Living > Pest Control - Animal Deterrents

* Mosquito dunks * Deemed fit for organic production by the USEPA in accordance with the USDA's National Organic Program * Simply apply Mosquito Dunks to your water garden or any standing water * Kills within hours * Lasts 30 days or more * Each dunk treats 100 square feet of surface water * Registered for sale by health Canada Pest Management Regulatory Agency * 20 pack,, 5 packs per order *** Sold in packs of 5 -- INSECT & RODENT CONTROL > Insect Control

Biological mosquito control with natural organic materials. Kills mosquitoes for 30 days or longer when placed in standing water outdoors. Place wherever water accumulates. 1 dunk treats 100 sq- ft of surface area of standing water. Pack of 5. -- Patio & Garden > Lawn & Landscaping - Gardening Supplies

3 out of 5 stars!   mosquito dunks 2010-09-26

this is definitely a good price. i don't know how they compare in effectiveness to the more expensive ones. in any case, i like having enough to plop in all the various containers that collect water.
          -- Linda Coyner Naples, FL United States

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