Cardston has its share of mosquitos during the summer months, when conditions are right and there are bodies of still water laying around.
In an attempt to get a handle the mosquito problem, the Town has engaged in an aggressive mosquito control program.
We focus on both larvicide and on adulticide to control the population as much as possible. Larvicide is carried out by adding a chemical to stagnant water supplies that either kills or prevents the maturation of mosquitos in the pupa or larval stage. It is the most effective method of mosquito prevention, since there can be tens of thousands of mosquito larva killed with a single application in a larger body of stagnant water like a pond.
Adulticide is much less effective. The Town conducts spraying, or fogging, certain areas with a pesticide called Malathion ULV (Ultra Low Volume). Application of Malathion can only occur on days that fall within a certain range of heat, moisture, and wind so the exact day and time of the applications is always uncertain. Further, the malathion dissipates quite rapidly and only affects those mosquitos it comes directly into contact with. So while fogging may appear more effective than larvicide, it generally kills only a fraction of the number larvicide does.
We encourage all Town residents to educate themselves regarding Malathion ULV in preparation for summertime application so that all residents and households in Town can keep themselves safe while spraying is ongoing. We have assembled a short list of government prepared documents that explain how Malathion works, the potential dangers to humans, and how to stay safe.
- Health Canada, Pest Management Regulatory Agency. “Re-evaluation Decision for Malathion” November 8, 2012.
- R. A. Ellis, “Evidence Review: Communicable Disease (Vector-borne Disease Management).” BC Ministry of Healthy Living and Sport. Pages 30-35
To ensure your health and that of your family, please stay away from the applicator while adulticiding is taking place. If you have respiratory problems, allergies, small children, or if you are pregnant or nursing please stay inside with the windows closed and the A/C shut off to avoid breathing in the airborne pesticide. If you are concerned about Malathion ULV fogging near your residence, please submit your concern to the Town at firstname.lastname@example.org.