“Our surveillance efforts indicate high infection rates in these areas,” District Manager David Brown said. “Aerial spraying in addition to the ongoing ground treatments is necessary to quickly reduce adult mosquito populations, interrupt the virus transmission cycle and to protect public health.”
For the past few weeks the District has been closely monitoring the area of South Sacramento County where many birds have tested positive for WNV. On June 4th, 32 mosquito samples tested positive prompting the District to take immediate action.
“We’re very concerned because this season, West Nile virus activity came much sooner than previous years” Brown said. “A mild winter, a reduction in financial resources and an increase in regulations have resulted in the number of adult mosquitoes we’re seeing now. If this trend continues we will likely have a long and intense mosquito season.”
The area of treatment is approximately 30,000 acres from Elder Creek Road down to Elk Grove Blvd and from Bruceville Road on the west to Excelsior Road on the east and bordering with Grantline Road. Treatments will be made using either a pyrethroid or an organophosphate insecticide registered for use in mosquito control by the US Environmental Protection Agency (EPA) and California EPA.