Aerial Spraying to Control Mosquitoes Infected with West Nile Virus Begins Tuesday Night


August 22, 2011


–Treatments will cover Wilton and Elk Grove areas of South Sacramento County

Elk Grove, Calif.— The Sacramento-Yolo Mosquito and Vector Control District announced today that aerial treatment for adult mosquitoes that may carry the potentially fatal West Nile virus is scheduled for two consecutive nights beginning Tuesday, August 23 from approximately 8:00 pm to midnight over portions of  Elk Grove and Wilton, the two areas of concern in South Sacramento. “Our surveillance efforts indicate high infection rates in these areas,” said David Brown District Manager.  “Aerial spraying in addition to the ongoing ground treatments is necessary to reduce adult mosquito populations, interrupt the virus transmission cycle and to protect public health” said Brown.

View Aerial Treatment Information Page with Map

During the past few weeks, the District has been closely monitoring these two hot spots where many infected dead birds and mosquito samples have tested positive for the disease. Approximately 32,500 acres will be treated with Evergreen 60-6, an insecticide registered for use in mosquito control with the Environmental Protection Agency. This is the same pyrethrin based product that has previously been used in other aerial applications by the District

The two areas that will be treated include 21,700 acres in the Elk Grove area from Mack Rd. to Elk Grove Blvd and from I-5 to Waterman Rd.  In Wilton, 10,800 acres will be treated. The area is roughly from Cosumnes River to Walmort Rd. Please see the attached map and refer to the website for exact treatment locations. While attempts are made to notify the public, the District may postpone or cancel a scheduled application due to unfavorable weather conditions or other reasons.

While most of the WNV activity has been centered in South Sacramento, all residents should remain vigilant because virus activity has also been detected in other areas of Sacramento County. Fortunately, no human cases have been reported in our area, however statewide, a total of 12 human cases have been confirmed.

Contact: Luz Maria Rodriguez, Public Information Officer

Office: 916.405.2082 | Cell: 916.416.6337


2011  West Nile virus activity update:

Level  2–Sacramento County: 40 dead birds, 0 sentinel chickens, 164 mosquito samples have tested positive for West Nile virus to date.

Yolo County: No activity has been registered.