Noxious Weeds in Manitoba
Weed species in Manitoba are not all created equal. Specific weeds have been designated as "Noxious" and have been categorized into different tiers based on their significant threat to agricultural primary production. Tier 1 weeds must be eradicated without conditions. Proper identification is important and control measures will depend on the species. Control of Tier 1 weeds is the landowners responsibility (e.g. farmer, company, or Government, including Manitoba Highways). The Provincial Mandate to control Noxious weeds is through the Noxious Weeds Act, but implementation of the Act is at the Municipal or Weed Control District level. See Manitoba Weed Supervisors Association and the Manitoba Weed Supervisor Weed Districts map.
List of Noxious Weeds in Manitoba
Controlling Noxious Weeds FAQs
Noxious Weeds Legislation
Manitoba Noxious Weeds Distribution Maps
The maps below indicate the municipalities where these weeds have been found up to and including the 2024 crop season.
Palmer Amaranth Distribution - 2024
Smooth Pigweed Distribution - 2024
