A highly-targeted approach for the control of yellow fever mosquito infestations in Southern California.

We are periodically updating this page. If you have any questions, you can always contact us.

What Residents Can Expect

There is NO need for residents in the impacted area to do anything differently than they would normally. Because we are releasing male mosquitoes, you may notice an increase in flying adult mosquitoes, however these mosquitoes will not bite.

If you are receiving mosquito bites, it is not related to this program.  Protect yourself and your family from mosquitoes:

  • Keep tight-fitting screens on your doors and windows to prevent mosquitoes from flying into your home.
  • Use insect repellent containing EPA-registered active ingredients such as DEET, Picaridin, and IR3535 when outdoors.

Residents in the areas selected for this treatment program can assist by volunteering their yards as male mosquito release sites and for the placement of surveillance traps for the approximate 10 week duration of the pilot program.

Check inside the home for vases, plant saucers or other containers that may be breeding mosquitoes. Dump out the water, scrub them thoroughly, and store them or clean them weekly.

As with all mosquitoes, make sure doors and windows have screens that are in good repair to keep them out.

Residents in areas immediately surrounding the release sites may notice a decrease in mosquito numbers as a result of this program because fewer mosquitoes will survive to reproduce during the hot summer months.

For residents outside of the program site, our services are still available. We will continue to conduct our control and surveillance activities. This includes monitoring public areas that have stagnant water as well as responding to service requests. The surveillance of West Nile virus activity will continue as well.

We will be in the program area several times per week. This is to release mosquitoes and monitor traps.

We never require you to allow our staff inside your home. We only inspect yards and common areas where mosquitoes thrive.

All of our trucks are well-marked on both sides with our logo. Staff wear uniforms with a logo, and will have badges prominently displayed. Please feel free to call our office at 562-944-9656 if you are unsure. Safety is priority for our residents and our staff.

We are a governmental agency. Our program is prefunded through a benefit assessment, so there will never be a charge when we come out to help.

About the Released Male Mosquitoes

Male mosquitoes do not bite, so the released males pose no risk to people, other animals, or the environment. These males carry a tiny amount of the IGR pesticide, which specifically targets the immature mosquito larvae. It has very little environmental impact and has very low to no mammalian toxicity.

Pyriproxyfen is approved by the Food and Agriculture Organization/World Health Organization for use in drinking water.

Non-biting, male yellow fever mosquitoes (Aedes aegypti) are dusted with a small amount of an insect growth regulator (IGR) called pyriproxyfen. The males are then released in infestation areas to deliver this dust to both mosquito breeding water sources and female mosquitoes, which will then also carry this dust to breeding sources when laying her eggs.

Pyriproxyfen is an insect growth regulator (IGR) that, when applied to mosquito breeding sources, will prevent the immature mosquitoes (larvae) present in the water from maturing into flying and biting adults.

Learn more about pyroproxyfen HERE

This approach is better because the male mosquitoes are very effective at locating females and both males and females are very good at locating water sources. This results in a much more targeted approach than traditional treatment methods, meaning less pesticide is used in an infestation area.

This technique was recently used in Kentucky and Central California with good success. The dusted males are “self-delivering,” which means they will seek out the female yellow fever mosquitoes as well as the mosquito breeding water sources that need treatment.

This is a much more targeted application than traditional treatment options and promises to be highly effective.

You will not be able to tell the released males apart from wild mosquitoes in your neighborhood. Since male mosquitoes do not bite, you will not experience an increase in biting.

No. The released male mosquitoes have not been genetically manipulated.

A good relationship with our residents is key to controlling the invasive mosquitoes that can change the way we live.

You can contact us at 562-944-9656 or email us at [email protected]

Click here to read more about the Program

Click here to read the Fact Sheet