Mosquito Control Without Chemical Insecticides

Most municipalities no longer conduct widespread, preventative spraying for adult mosquitoes, which is largely ineffective. Larval control mechanisms, and minimization of standing water for breeding are the main effective controls against mosquito populations.

In Bucks County, when problem areas arise due to inefficient breeding control, adult spraying is conducted, usually with Ultra Low Volume spray (fogger) application of Pyrethroids, such as Permethrin and PBO mixes, which are highly toxic to bees, other beneficial insects, and water-dwelling critters. There are many home methods that can be undertaken to reduce the risk of mosquito outbreaks, which are risk factors for diseases such as West Nile Virus.

Eliminate standing water from your property:

  • Drain pools when not in use, support with floats to minimize water accumulation on top of covers
  • Clean gutters regularly
  • Provide adequate drainage for all gutter outputs and flood areas
  • Provide adequate circulation for garden ponds
  • Cover trash receptacles and drill holes in bottom to provide drainage
  • Do not over-water lawns and garden beds
  • Replace water in bird baths and rain catching buckets regularly


Stock isolated, man-made ponds with insect consuming fish such as goldfish, koi, and mosquito guppies. Reduce fish feeding to encourage mosquito larvae as alternate food source.

When standing water cannot be eliminated, use safe, species-specific controls against larval mosquitoes such as commercial products containing Bti (Mosquito Dunks, etc.) to treat these potential breeding grounds . Birds and Bats can also provide a good source of control for adult mosquitoes. See Biological Controls for More Information

Minimizing Mosquito Bite Risk

  • avoid being outdoors between dusk and dawn
  • wear long clothing to cover exposed skin
  • use mosquito nets/screens or tents on porches and decks
  • use a personal insect repellent (Lemon Eucalyptus formulas are some of the most effective natural repellent alternatives to DEET formulas)
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