Aerial Mosquito Larvicide Applications

To better protect our communities and the environment, the Vector Control Program (VCP) applies mosquito larvicide via helicopter to mosquito breeding areas that cannot be treated by hand. Vector Control Program staff are present before, during, and immediately following the treatment to monitor the application and answer questions.

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.