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Posted on: May 17, 2019

Mosquito Control

Mosquito Control

For several years, the Public Works Department provided mosquito adulticide services, a weekly application of mosquito control spray in residential areas throughout the City from late May to mid-September. In October 2018, the Board of Aldermen agreed to discontinue this service except for special events such as Brentwood Days and Music on the Menu. The adulticide services were not effective in reducing the mosquito population and instead harmed other, beneficial insects.

The Public Works Committee discussed this issue during many meetings. Effectiveness, not cost, was a key factor in the decision to discontinue the service. The chemical had to make direct contact with the mosquitoes to be effective. The spraying had to be done in the evenings when mosquitoes are active but also at a time when other insects would not be harmed. Many residents opted out of the service, so the operator would turn off the sprayer when reaching the addresses of homeowners who opted out. Dispersion was also a factor in the decision. The weather conditions at the time of spraying had to be perfect for the chemical to reach beyond the street or front yard.

The City will continue contracting with St. Louis County Vector Control Services for control of mosquito larvae. 

Residents are encouraged to remove standing water on their private property and complete other preventive measures to reduce potential mosquito breeding locations. 

How to Control Mosquitoes in Your Neighborhood

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