If you spot a pile of tires exposed to precipitation, please let us know. Tires, whether old or new, are mosquitoes’ best breeding territory, because they warm up in the sun and hold water long-term invisible to human eyes. N.b. in West Chester, tires should be stored inside, not outside.
Excerpt from “What Tire Pile Owners Should Know About West Nile Virus” download at PA DEP:
Could a tire pile be a mosquito-breeding site?
Tire piles could provide suitable areas for mosquitoes to live, including those known to carry WNV. When discarded tires are allowed to accumulate even a small amount of water, they become attractive sites for mosquitoes to lay their eggs. For example, during the course of one season, thousands of mosquitoes can emerge from just one tire. If tires infested with mosquito eggs, larvae or pupae are transported, the potential to spread mosquito populations increases. This is one of the theories on how WNV was introduced into the United States.
How can a property owner prevent mosquito breeding?
It is the responsibility of the tire pile owners to make sure that the pile does not create a nuisance or health hazard. There are a number of ways to eliminate mosquito production in tire piles.
Standing water in the tires should be eliminated. This can be accomplished by properly storing tires under a tarp or other cover, removing the side wall, or drilling holes in the back of the tire.
In situations where eliminating mosquito production areas is not a practical alternative, larviciding is the most effective control technique….
read the full download here: Tire piles 3800-FS-DEP2535
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