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Nuisance Mosquito Larviciding Program underway

Posted: May 8, 2019


Nuisance Mosquito Larviciding Program underway

The RM of West St. Paul, in partnership with the City of Winnipeg, has begun a Nuisance Mosquito Larviciding Program in the municipality.

Larviciding is the most effective and environmentally acceptable method of mosquito population reduction. Mosquito larvae are concentrated in water sites which make them the most vulnerable stage of the mosquito lifecycle.  By targeting larvae in ditches, pools and containers, countless numbers of mosquitoes are killed before they reach the flying adult, biting stage.

Mosquito larvae occur in many types of aquatic habitats.  The most common nuisance species lay their eggs in temporary or ephemeral rainwater pools of 1 to 2 weeks duration.  Vector, or disease carrying, species generally lay eggs in all types of containers, semi-permanent and permanent aquatic habitats.

The Larviciding Program uses a combination of biologicals and biorational larvicides that are applied according to Health Canada's Pest Management Regulatory Agency (PMRA) regulations.  

A biological insecticide is used in populated areas, and it is safe for humans and domestic animals.