Invasive Weed Management

Plants are designated as weeds due to their invasive growth habit, lack of palatability to livestock and their ability to out compete agricultural crops. Many of the weeds that are of concern today started out in people's flower beds, escaped as ornamentals and due to their invasive nature and lack of native pests they became a problem.

The Weed Control Act was enacted in 1907 to prevent the spread of invasive plants. The Alberta Weed Control Act was updated in 2010 to help prevent invasive ornamentals and weedy plants from establishing within the province. In the new act "Restricted" weeds have been renamed as "Prohibited Noxious". The old restricted weed list only contained seven weed species, but on the new Alberta Weed Control Regulation there are 46 weeds listed as Prohibited Noxious.
Prohibited Noxious weeds are generally not found in high numbers in Alberta, they are invasive and pose an economical threat and must be eradicated. Noxious weeds are not necessarily widespread but may be more abundant in some municipalities than others. Their spread needs to be controlled.
An Alberta Invasive Plant Identification Guide has been put together by Wheatland County and contains pictures and information on the weeds that appear in the Act.

Weeds of Concern in the M.D. of Pincher Creek
While all weeds within the Weed Control Regulation should be controlled, some weeds are more common within our municipality. The following is a list of prohibited noxious and noxious weeds to be on the lookout for. If found, these weeds should be eradicated or controlled. Please contact the Agricultural and Environmental Services Department if you require assistance with weed identification or control.
Please click on the name of each weed to learn more about them. Information is provided by the Alberta Invasive Species Council:

Noxious Weeds:
Baby’s-Breath, commonGypsophila paniculata L.
BlueweedEchium vulgare L.
Brome, downyBromus tectorum L.
Burdock, greatArctium lappa L.
Buttercup, tallRanunculus acris L.
Chamomile, scentlessTripleurospermum inodorum (L.)Shc. Bip.
Daisy, oxeyeLeucanthemum vulgare Lam.
Dame’s RocketHesperis matonalis L.
Henbane, blackHyoscymus niger L.
Hoary CressLepidium appelianum Al-Shehbaz
Hound’s-tongueCynoglossum officinale L.
Mullein, commonVerbascum Thapsus L.
Scabious, fieldKnautia arvensis(L.) Coult.
Sow Thistle, perennialSonchus arevensis L.
Spurge, LeafyEuphorbia esula L.
Tansy, commonTanacetum vulgare L.
Thistle, CanadaCirsium arvense (l.) Scop.
Toadflax, dalmationLinaria dalmatica (L.) Mill.
Toadflax, yellowLinaria vulgaris Mill.

Prohibited Noxious Weeds:
Hawkweed, meadowPilosella caespitosa Dumort.
Hawkweed, mouse-earPilosella officinarum L.
Hawkweed, orangePilosella aurantiaca L.
Knapweed, diffuseCentaurea diffusa Lam.
Knapweed, RussianRhaponticum repens (L.) Hidalgo
Knapweed, SpottedCentaurea stroebe L. ssp.micranthos (Gugler) Hayek
Thistle, NoddingCarduus nutans L.

Other weeds to be on the lookout for:
CarawayCarum carvi


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Municipal District of Pincher Creek No. 9
Box 279
1037 Herron Avenue, Pincher Creek, AB T0K 1W0
Phone: 403-627-3130       Fax: 403-627-5070
Email: info@mdpinchercreek.ab.ca
Office Hours: By Appointment Only due to COVID-19

Municipal District of Pincher Creek No. 9
Box 279
1037 Herron Avenue
Pincher Creek, AB T0K 1W0
Phone: 403-627-3130
Fax: 403-627-5070
Email: info@mdpinchercreek.ab.ca
Office Hours: By Appointment Only due to COVID-19
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