Step 1: Larval mosquito control
Mosquito Control employees in Cass County spend the months of April and May applying preventative larvicides (products used to kill mosquito larva) to standing water. In the spring, water temperatures are low, slowing the insects development.
This provides time to treat the breeding sites and prevent the mosquitoes from becoming adults.
Three products make up the majority of the larvicides used within Cass County.
The first, methoprene, is an insect growth inhibitor that is specific to mosquitoes and insects with similar biology such as midges. Methoprene pellets and briquettes are essential because of their sustained residual. Pellets can control mosquito larvae for 30 days, and briquettes up to 150 days.
Two other products are used in Cass County. Both have a corn cob base coated with one of two naturally occurring soil bacteria (Bacillus sphaericus or Bti). These products disrupt the digestive system of the mosquito, and are not harmful to humans, pets, fish or birds.
Vector Control employees apply corn cob granules to standing water after each rain. The product is quick and effective, but is often used in addition to methoprene pellets because of its run-off capability.
Bti briquettes can be purchased in most lawn and garden departments. Often referred to as "dunks or donuts," these products can be used by homeowners to kill mosquito larvae in ornamental pools and low–lying areas. Each briquet treats a 100 square foot area for 30 days.
Areas that hold water for more than 5 days could potentially be breeding sites for mosquitoes. Vector Control employees continually map potential breeding areas. This map is available on the larviciding link at www.casscountygov.com
Vector Control appreciates your assistance in locating and treating standing water
Step 2: Adult mosquito control
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