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Invasive Species Awareness Week in Manitoba
April 18 - 24, 2021
By Grant Shewfelt,
Supervisor, Argyle-Lorne Weed Control District
The Province of Manitoba has declared the last full week of April as Invasive Species Awareness Week (C.C.S.M. c. I97).
The Manitoba Weed Supervisors Association (MWSA) recognizes this week by highlighting just a few of the invasive plants considered to be a significant threat to the landscape of our province.
Many of these invasive species are mistaken for wildflowers, but unlike native wildflowers, these species threaten agricultural productivity of both cultivated and non-cultivated land, as well as waterways and natural areas.
The Noxious Weeds Act of Manitoba (NWA) requires control or destruction measures for different invasive plants.
A comprehensive listing of noxious weeds is found in The Noxious Weeds Regulation, which contains schedules that ranks plants according to their threat levels and specifies the areas of the province to which these levels apply.
The Act requires that Tier 1 weeds must be eradicated without conditions. Examples of Tier 1 weeds that are currently negatively affecting Manitoba’s ecosystems are diffuse and spotted knapweed, orange hawkweed, red bartsia and tall waterhemp.
More information on Invasive plants either threatening or already present in Manitoba can be found in The Noxious Weeds Act (C.C.S.M. c. N110) and the Noxious Weeds Regulation (Man.Reg.42/17), by contacting your local Weed District or at the MWSA website, www.mbweeds.ca