Larvicide: Treating for West Nile Virus

Larvicide Sprayer and Bike

We are treating high-risk areas throughout the region to kill mosquito larvae. These areas include storm drains and sections where water collects and remains.

The larvicide we use is in the form of pellets, which dissolve in water. This chemical is effective to kill mosquitoes in the early stages of their life, rather than using a pesticide to kill adult mosquitoes.

The larvicide we are using this season is BTI (Bacillus Thuringiensis Israelensis), which has been approved for mosquito control by Health Canada.

Exposure to this Larvicide is Not Likely

We are treating areas that are inaccessible to the public, such as down sewer drains.

If a person does come in contact, a concentrated exposure could cause mild skin and eye irritation. Rinse the eyes with tap water for 20 minutes and wash the skin thoroughly with soap and water. If the symptoms persist, seek medical attention.

Treatment to Take Place June, July and August

Paint Marks are left on Storm Drains after being Treated Each city/town will be treated during the summer. More treatment may take place after periods of heavy rain.

Storm drains are painted with a blue, white and pink dot to show it has been treated with larvicide.

For more specific information on larvicides visit Health Canada's Pesticides and Pest Management website.

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