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Upcoming Aerial Larvicide Applications August 2024

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  • Upcoming Aerial Larvicide Applications August 2024
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Date: Aug 23 , 2024
Category: News & Announcements

Keep an eye on the skies next week as helicopters will be active over the San Elijo and San Dieguito lagoons. Due to warmer weather, higher tides, and standing water, there has been a noticeable increase in mosquito activity. To address this, The County Vector Control Program (VCP) has scheduled an aerial mosquito larvicide application for Wednesday, August 28th, and Thursday, August 29th. This method is a key part of the VCP's commitment to protecting both the community and the environment. by deploying helicopters to apply larvicide in areas where manual treatment isn't feasible. Rest assured, these larvicides are safe for humans, pets, plants, and wildlife.

These aerial applications occur every three to four weeks during the mosquito breeding season, generally April to October, or as needed. The granular larvicides used by the Vector Control Program act specifically on mosquito larvae and will not harm people, pets, plants, or wildlife. The larvicide consists of granules containing Lysinibacillus (Bacillus) sphaericus, Bacillus thuringiensis israelensis, and/or Saccharopolyspora spinosa products. These naturally occurring bacteria target mosquito larvae and prevent them from developing into biting adults.

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2024 Aerial Larvicide Application Schedule

  • April 24 and 25 (if needed)
  • May 15 and 16
  • June 5 and 6
  • June 26 and 27
  • July 17 and 18
  • August 7 and 8
  • August 28 and 29
  • September 18 and 19
  • October 9 and 10 (if needed)

Please note, aerial larvicide application dates are subject to change depending on conditions.

If you would like to sign up to receive e-mail notifications of scheduled aerial applications, you can subscribe here. 

If you encounter a mosquito problem in your neighborhood, reach out to the County Vector Control Program:

Protect Yourself & Your Home

Residents should also help protect themselves from mosquitoes in and around their homes by finding and dumping out standing water to keep the pests from breeding. Getting rid of mosquito-breeding sites is critical to lowering the number of mosquitoes in our community. A mosquito only needs a tiny bottle cap-size pool of water to lay up to 300 eggs, which is why removing standing water is critical.

The Basics: 

  • Do not leave standing water in watering cans, empty after each use.
  • Do not let ANY water sit in drip pans under plants. Place sand or fine gravel in the drip pans. Make sure pots are draining well and there are no puddles, even tiny ones can become a breeding ground.
  • Fix any leaky faucets and hoses. Mosquitoes can breed in the water that pools underneath them.
  • Water can collect in cans, bottles, toys, coffee cups, pet bowls, etc. Clear your patio of any potential breeding debris. 
  • Mosquito fish may be picked up free of charge at different locations throughout San Diego County.

Protect yourself from mosquito-borne illnesses by wearing long sleeves and pants or use insect repellent when outdoors. Use insect repellent that contains DEET, picaridin, oil of lemon eucalyptus, or IR3535. Make sure screens on windows and doors are in good condition and secured to keep insects out.

Some useful mosquito (and other vectors) information can be found on the County of San Diego’s vector control website and useful fact sheets on preventing mosquito breeding and protecting against mosquito bites can be found here.