Wellington-Dufferin-Guelph Public Health will conduct a mosquito larvicide program from May 16 to October 31, 2022. The Medical Officer of Health has authorized the program to reduce mosquito populations suspected of carrying West Nile virus. Ministry of the Environment, Conservation and Parks licensed applicators or trained technicians will apply the larvicide by hand, in and around communities in Wellington and Dufferin Counties.
Larvicide will be used in mosquito larvae breeding sites, such as:
- roadside ditches
- temporary pools
- sewage lagoons
- storm-water retention ponds
- areas of standing water
- municipal catch basins
For catch basins:
Altosid Pellets (PCP#21809, pellet); Altosid XR Briquets (PCP#27694, ingot); and VectoLex WSP (Reg. No. 28009, pouch).
For standing water sites:
VectoBac 200G (Reg. No. 18158, granular); and VectoLex CG (Reg. No. 28008, granular).
Altosid is a methoprene product; VectoBac is a Bacillus thuringiensis israelensis product; and VectoLex is a Bacillus sphaericus product. When used according to directions, these larvicides pose little risk to people. For information about the products used or details on the exact locations and dates of treatment please call our toll-free number:
For more information contact:
Water Exterminator Mosquito/Biting Flies
Canadian Centre for Mosquito Management