Additionally, the City also operates a vector control program to help keep mosquitoes in check. Each year we receive questions from concerned residents about the product being sprayed and how its being applied. We've compiled a list of these frequently asked questions with answers to explain how our vector control program works.
What product is being sprayed and how often is it applied?
The City uses Kontrol 4-4, a product that is approved by the Environmental Protection Agency (EPA) for ground and aerial applications in outdoor residential, recreational and other areas. Kontrol 4-4 is applied at extremely low dosage rates-approximately less that one once per acre. The City sprays once per week through the months with mosquito activity, usually May through September. The City is separated into three geographic spraying zones with assigned days of the week:
- Monday: North of Dorsett and East of I-270
- Tuesday: North of Dorsett and West of I-270
- Wednesday: South of Dorsett
Who provides the service and how is it applied?
The City provides this service directly with the vector control program being administered by the Department of Public Works. The Crew Leader running the program is a certified public pesticide applicator who is trained and licensed by the Missouri Department of Agriculture. In addition to training, proper equipment is a must. The City uses a machine that is precisely calibrated to ensure that the least amount of product is used, while still allowing for effective vector control. The City uses an Ultra Low Volume (ULV) machine that breaks the liquid into very fine aerosol droplets that contain small quantities of active pesticide ingredients that stay aloft and eliminate mosquitoes on contract. Kontrol 4-4 is an adulticide, which means that it affects mosquitoes in the adult life cycle only.
It's also important to note that when city staff are operating the machinery, they turn off the machine so the sprayer does not disperse near people.
What other measures are taken to control the mosquito population?
The City contracts with St. Louis County for larvacide services, which includes treating creeks and other standing water areas to eliminate breeding sites and stop mosquitoes while they are still in the water.
How can I report mosquito problems, ask questions or state concerns about mosquito prevention practices?
All questions or concerns may be directed to the City at (314) 291-6550 or firstname.lastname@example.org. We'll determine if the contact is regarding a city or county practice and route it to the appropriate staff person for review and response. St. Louis County has some great information about mosquito breeding, tips for eliminating standing water, control products and other solutions on their website at www.stlouisco.com/Health-and-Wellness/Vector-Control/Mosquito-Control.