News Details

Aerial Spraying to Control Mosquitos

August 23, 2012


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 starting Thursday, August 23rd from approximately 8:00 pm to midnight over the City of Woodland in Yolo County. “Our surveillance efforts indicate high infection rates in this area,” said David Brown District Manager. “In the last few days many mosquito samples and dead birds have tested positive for disease and its necessary to act quickly in order to reduce the numbers of infected adult mosquitoes and reduce the risk of human infections” added Brown.

The aerial applications will cover almost 15,000 acres in the City of Woodland from Churchill Downs Ave. and County Rd. 19B on the north to County Rd. 25A on the south and from County Road 97 on the west to County Road 103 on the east. For exact spraying locations please refer to the attached map or visit Treatments will be made using Sumithrin, a synthetic pyrethroid and Trumpet, an organophosphate both registered for use in mosquito control by the US Environmental Protection Agency (EPA) and California EPA. 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. The District will also conduct ground treatments to supplement these aerial applications.

The District reminds all residents that WNV activity is widespread throughout both Sacramento and Yolo counties and everyone should protect themselves from mosquito bites by always wearing an effective insect repellent and avoiding the outdoors especially at dawn and dusk when mosquitoes are most active. For a detailed map of all WNV activity in both counties, please visit:

Residents can subscribe to receive email notifications for mosquito treatments by zip code. To sign up, visit and go to Spray Notifications.

Information for current treatments planned is also available on the District website under Spraying Updates.

( Click here for the press release )