Adulticide – Williston – 6/29/2022

Posted on June 29, 2022

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

UPDATE 6/29 @ 8:00 pm Due to unfavorable conditions, tonight’s ground adulticide treatment for spray blocks 1 – 4 in the City of Williston has been canceled. The previously scheduled aerial adulticide treatments for Thursday, June 30, (Epping, Grenora, and Ray) and for Friday, July 1 (all Williston area spray blocks) will still be attempted, weather and conditions permitting.


The Williston Vector Control District is tentatively scheduled to conduct a ground adulticide treatment for spray blocks 1 – 4 in the City of Williston on Wednesday, June 29. Treatment will take place near sunset, weather and conditions permitting. Citizens are reminded to please stay at least 300 feet back from Vector Control vehicles while they are fogging.

For more information and a map of the WVCD Spray Blocks, please refer to the Spray Reports 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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