West Nile Virus

Notice of Pesticide Use

Between May and October 2017, the Regional Municipality of Durham and the Ontario Ministry of Transportation will be conducting larviciding programs, under the authority of Durham Region's Medical Officer of Health, to control larval mosquitoes in order to prevent their development into vectors of West Nile virus.

The pellet and/or briquette formulation of the larvicide methoprene (Altosid - Registration No. 21809 and No. 27694 under the Pest Control Products Act, Canada), or the water soluble pouch formulation of the larvicide Bacillus sphaericus (VectoLex WSP - Registration No. 28009 under the Pest Control Products Act, Canada), will be placed into catch basins of storm drains in areas across the Regional Municipality of Durham.

The liquid and granular formulation of the larvicide Bacillus thuringiensis subspecies israelensis (Vectobac 1200L - Registration No. 21062 and Vectobac 200G - Registration No.18158 under the Pest Control Products Act, Canada) will be placed in temporary pools of standing water, ditches, and storm water retention ponds in areas throughout the Regional Municipality of Durham.

The granular formulation of the larvicide Bacillus sphaericus (VectoLex CG - Registration No. 28008 under the Pest Control Products Act, Canada) may be placed in sewage lagoons in areas across the Regional Municipality of Durham.

All larvicides will be applied by Ontario Ministry of the Environment and Climate Change licensed applicators or trained technicians.

For more information on the locations and dates of treatment on: