Adulticide – Williston & Trenton – 7/18/2022

Posted on July 18, 2022

Notice of aerial adulticide campaign with image showing a mosquito crossed out

UPDATE 7/18 @ 6:30 PM: Tonight’s aerial adulticide treatment for the Williston area spray blocks and the Trenton spray block has been rescheduled for tomorrow due to weather. Weather and conditions permitting, the treatment will begin near sunset on Tuesday, July 19.


The Williston Vector Control District is tentatively scheduled to conduct an aerial adulticide treatment for all Williston spray blocks and the Trenton spray block on Monday, July 18. Treatment will take place near sunset, weather and conditions permitting. This treatment is in place of the regularly scheduled ground treatments on Mondays for the Williston area.

For more information and a map of the WVCD Spray Blocks, please refer to the Spray Notices webpage.

Williston Vector Control uses Zenivex E20 for adult mosquito control treatments (adulticides), which contains the active ingredient Etofenprox. Zenivex E20 is a product approved for use in residential areas by the Environmental Protection Agency (EPA).

To avoid mosquito bites, citizens are advised to take extra precautions when spending time outdoors during the hours of dusk to dawn during the summer months. Wearing long sleeve tight knit shirts and long pants, limiting time outdoors during these times, and using a mosquito repellent such as DEET, Picardin, or oil of lemon eucalyptus are good actions to take to prevent bites. Citizens can help prevent mosquito re-population by eliminating standing water on their property.

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