Mosquito Dunk is very effective for mosquito control. Each mosquito dunk will cover 100 square feet of water regardless of how deep the standing water is.
Use Mosquito Dunks in any standing water including rain barrels, bird baths, tree holes, elevator shafts, planter reservoirs, rain gutters, etc. As the "Dunk" slowly dissolves, it releases a bacterium which is toxic to all mosquito larvae.
Mosquitoes lay their eggs directly in standing water or an area known to flood. While the adult mosquito is a typical six legged, four winged, flying insect pest, their larvae only survive in an aquatic environment. Mosquito Dunks are a microbial larvicide, which means it controls only the larval stage of development utilizing a bacterial active ingredient. When placed in standing water the Dunks float and release a natural soil borne bacterium, Bti (Bacillus thuringiensis subspecies israeliensis). This bacteria is ingested by the mosquito larvae within the water and soon after kills the mosquito larvae with no effect on anything else. Mosquito Dunks slow release properties mean that they keep releasing the Bti for at least 30 days or more, effectively keeping mosquitoes from emerging and becoming biting, disease spreading adults.
