Why is Durham Region larviciding?
Durham Region’s West Nile virus (WNv) Vector Control Plan includes the use of pesticides to help reduce and control WNv mosquito populations. The use of larvicides is considered when other measures to reduce and control mosquito breeding sites are inadequate. Research shows that roadside catch basins are prime breeding sites for mosquitoes associated with WNv. As a result, monitoring and larviciding of regional and municipal catch basins have become necessary components of the Vector Control Plan. Surveillance and/or treatment of standing surface water on regional and municipal property will be based on a WNv risk assessment.
