All photography provided by MWSA Members

The Manitoba Weed Supervisors Association is comprised of and represents Weed Supervisors who are individually employed by Weed Control Boards formed within their respective Districts.


Noxious Weeds Act

The Noxious Weeds Act of Manitoba dates back to the very beginning of Manitoba.  Members of the MWSA use the Noxious Weeds Act in performing their regulatory duties.  The purpose of this act is to aid in the controlling spread of weeds in the Province as shown in this excerpt from page 1 of the Act:

General duty to destroy weeds 
3(1)        Each occupant of land, or, if the land is unoccupied, the owner thereof, or the agent of the owner, and each person, firm, or corporation who or which is in control of, or in possession of, or in charge of, land, shall destroy all noxious weeds and noxious weed seeds growing or located on the land as often as may be necessary to prevent the growth, ripening and scattering of weeds or weed seeds.

The Noxious Weeds Act of Manitoba can be found in entirety at the following link: Noxious Weeds Act

A Summary of Weed Control Efforts and Extension in Manitoba

In the first session of the First Legislature of Manitoba, in 1871, legislation was enacted with the object of controlling weeds in the Province.  In the reorganization Act of 1883, the duties of land owners and occupants to control noxious weeds was first established.  In that Act, the duties of path-masters to control noxious weeds on highways and railway lands was also identified, along with responsibilities and penalties for the sale of noxious weed seeds.  This Act also dealt with the appointment of district weed inspectors and enforcement of legislation.  An amendment to this act in 1894 authorized the cutting down of crops, on order from authorized persons, that were found to be infested with noxious weeds in order to facilitate better regional weed control.

Prepared by Kent Shewfelt for the Manitoba Weed Supervisors Association

Weeds Of Concern

  • Canada Thistle
  • Downey / Japanese Brome
  • Milkweed
  • Red Bartsia
  • Cleavers
  • Kochia
  • Nodding Thistle
  • Scentless Chamomile
  • Diffuse Knapweed
  • Leafy Spurge
  • Purple Loostrife
  • Tansy