Colusa Mosquito Abatement District

The District asks the public to help by inspecting homes and yards thoroughly and remove any standing water that may cause mosquito production. By a thorough inspection of the premises, various standing water situations could be found, such as fish ponds, bird baths, tin cans, water cans, saucers under potted plants, old tires, clogged rain gutters, abandoned pools, uncovered boats, water troughs, rain barrels, street gutters, house cooling units, tree holes, and water in basements during wet years. Pumping of these basements is very important as we progress into mosquito season. The District requests that the public refrain from over watering to the extent that water will run off into street gutters and remain standing. Any of these standing water situations may be reduced by the homes resident. If any problem is too large for the resident to correct, they may call the District for help in resolving some problems.

Common Mosquito Breeding Sources

• Abandoned pool
• Breeding source
• Old tires
• Mosquito larvae in bucket

Public Health Pesticide Notification

The Colusa Mosquito Abatement District gives notice that it intends to continue to control immature and adult mosquitoes in the District as necessary to protect the public's health. Applications may be made from the month of January through December. However, the majority of the applications occur between May and October. Application of pesticide is predicated on mosquito abundance as determined by the District's extensive surveillance system. Actual use varies annually depending on mosquito and vector-borne disease activity.
Our District follows an Integrated Mosquito Management (IMM) program that is an ecosystem based strategy. It focuses on long term prevention of mosquitoes through a combination of techniques such as biological control, habitat manipulation and pesticides. Pesticides are used only after monitoring indicates they are needed according to established guidlines. Treatments are made with the goal of eradicating only mosquitoes. Pesticides are selected and applied in a manner that minimizes risk to human health,beneficial and non target organisms, and the environment. These materials are registered by the US Environmental Protection Agency and applied according to label directions by the District's trained and certified technicians.

Below is a comprehensive list of the active ingredients the District may use:

Adult Mosquito Control:

• Bifenthrin
• Deltamethrin
• Etofenprox
• Lambda-Cyhalothrin
• Malathion
• Naled
• N-octyl bicyloheptene dicarboximide (MGK-264)
• Piperonyl Butoxide (PBO)
• Permethrin
• Prallethrin
• Pyrethrin
• Resmethrin
• Sumithrin

Larval Mosquito Control:

• Bacillus Thuringensis susp. Israeliensis (Bti)
• Bacillus sphaericus (Bs)
• Diflubenzuron
• Methoprene
• Monomolecular Films
• Petroleum Distillates
• Spinosad
• Temophos