Aerial Mosquito Larvicides Applications

The Vector Control Program has been conducting monthly aerial mosquito larvicide applications to difficult-to-access areas that are known for mosquito breeding.

The larvicides used by the Vector Control Program act specifically on mosquito larvae and will not harm other wildlife.The larvicide used is called VectoMax, which is a mixture of Bacillus sphaericus and Bacillus thuringiensis israelensis. It is applied by a helicopter every three to four weeks to the vegetation in the water bodies. The larvicide listed above is made from bacteria that only affect mosquito larvae.  The bacteria kill the larvae before they can develop into biting adults.

• VectoMax Label
• VectoMax MSDS

2013 Aerial Larvicide Application Schedule

• April 18, 2013
• May 8, 2013
• June 5, 2013
• June 26, 2013
• July 17, 2013
• August 7, 2013
• August 28, 2013
• September 18, 2013

Please note, future aerial larvicide application dates depend on mosquito trap counts. If counts are high, larvicide will be applied every three weeks. If counts are moderate, larvicide will be applied every four weeks. If counts are low, larvicide will not be applied.

If you would like to sign up to receive e-mail announcements of scheduled aerial applications, please click on the link:  E-Gov Delivery Notice Subscription If this link does not work, please visit http://service.govdelivery.com/service/multi_subscribe.html?code=CASAND and subscribe to Aerial Mosquito Larvicides Application, Countywide under Environmental Health.

Aerial Larvicide Applications Locations

For More Information On  WNV Or Other Vectors Contact:  (858) 694-2888   vector@sdcounty.ca.gov