The integrated Vegetative Management Program in the Municipal District of Provost uses the combination of various land management components to reduce the presence and impact of invasive species on the environment. These land management procedures include inspections, roadside spraying, and roadside mowing.

Invasive Weeds

Weed control work is necessary, even on small infestations, in order to prevent them from spreading and becoming more difficult to control. We encourage you to review the weed fact sheets at, and consider one or more of the control options provided. Fact sheets provide more information about individual invasive species. They contain information on impacts, origin, habitat, regulatory status, identification, prevention and control options.

Those listed as “Prohibited Noxious” and “Noxious” are regulated under the Alberta Weed Control Act. “Prohibited Noxious” weeds must be destroyed and “Noxious” weeds must be controlled.

In 2010, several plants were added to the noxious and prohibited noxious weeds list under the Alberta Weed Control Act, including a number of invasive ornamentals. Many of the new species can be found growing in flower beds or gardens.
Weed Control Act (2010)

Identification Guide

(Acknowledgement: Wheatland County)

Report a Weed

If you have questions or concerns regarding the Alberta Weed Control Act or for assistance with weed identification contact:
T: 780-753-0184
F: 780-753-2199

Weed Reporting is confidential

Municipal District of Provost Agricultural Services Department | 780-753-2168
The Alberta Ag-Info Centre | 310-FARM or 310-3276
The Alberta Invasive Species Council
Alberta Native Plant Council

Apps for Identifying Weeds

AAAF – Regulated Weeds, Fieldman Contact Info, Report a weed

• Android: Alberta Agriculture Fieldmen
• iPhone: Association of Alberta Agricultural Fieldmen – AAAF

AB Weed Spotter – Regulated Weeds in Alberta & look-alikes, Report a weed.

• Android: Not Available
• iPhone: Alberta Weed Spotter

Prohibited Noxious Weeds

These weeds pose a serious threat to agriculture and the environment and as such, must be eradicated. These weeds are capable of very rapid spread, are extremely competitive and can quickly destroy native vegetation and crops. Prohibited Noxious weeds must be destroyed by eradicating all growing parts of the plant or to render the reproductive mechanisms unviable. These weeds can be destroyed by hand pulling, cultivation or mowing followed by an application of an appropriate herbicide. Dispose of prohibited noxious and noxious weeds in a manner that will prevent spread of the seeds.

Prohibited Noxious Weeds Found/At Risk in the M.D. of Provost

• Knapweed, Diffuse
• Knapweed, Spotted
• Thistle, Nodding
• Hoary Alyssum

Autumn Olive (Eleagnus umbellate)
Balsam, Himalayan (Empatiens glandulifera)
Barberry, Common (Berberis vulagaris)
Bartsia, Red (Odontites vernus)
Buckthorn, Common (Rhamnus cathartica)
Cinquefoil, Sulphur (Potentilla recta)
Crupina, Common (Crupina vulgaris)
Dyer’s Woad (Isatis tinctoria)
Eurasian Water Milfoil (Myriophyllum spicatum)
Eurasian Water Milfoil (Myriophyllum spicatum)
Garlic Mustard (Alliaria petiolate)
Goatgrass, Jointed (Aegilops cylindrical
Hawkweed, Meadow (Hieracium caespitosum)
Hawkweed, Mouse-ear (Hieracium pilosella)
Orange Hawkweed (Hieracium aurantiacum)
Hoary Alyssum (Berteroa incana)
Hogweed, Giant (Heracleum mantegazzianum)
Iris, Pale Yellow (Iris pseudacorus)
Knapweed, Bighead (Centaurea macrocephala)
Knapweed, Black (Centaurea nigra)
Knapweed, Brown (Centaurea jacea)
Knapweed, Diffuse (Centaurea diffusa)
Knapweed, Hybrid (Centaurea x psammogena)
Knapweed, Meadow (Centaurea x moncktonii)
Knapweed, Russian (Acroptilon repens)
Knapweed, Spotted (Centaurea stoebe)
Knapweed, Squarrose (Centaurea virgata)
Knapweed, Tyrol (Centaurea nigrescens)
Knotweed, Complex (Fallopia spp./ Polygonum)
Loosestrife, Purple (Lythrum salicaria)
Medusahead (Taeniatherum caput)
Nutsedge, Yellow (Cyperus esculentus)
Puncturevine (Tribulus terrestris)
Ragwort, Tansy (Senecio jacobaea)
Rush Skeletonweed (Chondrilla juncea)
Saltcedar (Tamarix ramosissima)
Saltlover (Halogeton glomeratus)
St John’s-wort, Common (Hypericum perforatum)
Starthistle, Yellow (Centaurea solstitialis)
Thistle, Marsh (Cirsium palustre)
Thistle, Nodding (Carduus nutans)
Thistle, Plumeless (Carduus acanthoides)

Noxious Weeds

These weeds are highly invasive, can pose a significant threat to agriculture and the environment. They can quickly out complete native vegetation and crops. Many noxious weeds are also toxic to domestic animals and wildlife. Noxious weeds must be controlled. Noxious weeds must be controlled to prevent the spread of seeds and prevent the plants from being established. They can be controlled by hand pulling, mowing, cultivating or spraying them with an appropriate herbicide.

Noxious Weeds Found/At Risk in the M.D. of Provost

• Black Henbane
• Canada Thistle
• Common Baby’s Breath
• Common Tansy
• Leafy Spurge
• Ox-Eye Daisy
• Perennial Sow Thistle
• Scentless Chamomile
• Tall Buttercup
• Yellow Toadflax

Baby’s-breath, Common (Gypsophila paniculata)
Bellflower, Creeping (Campanula rapunculoides)
Bindweed, Field (Convolvulus arvensis arvensis)
Blueweed (Echium vulgare)
Brome, Downy (Bromus tectorum)
Brome, Japanese (Bromus japonicas)
Burdock, Great (Arctium lappa)
Burdock, Lesser (Arctium minus)
Burdock, Woolly (Arctium tomentosum)
Buttercup, Tall (Rananculus acris)
Chamomile, Scentless (Tripleurospermum perforatum)
Clematis, Yellow (Clematis tangutica)
Cockle, White (Silene latifolia Poiret ssp.)
Oxeye Daisy (Leucanthemum vulgare)
Dame’s Rocket (hesperis matronalis)
Henbane, Black (Hyoscyamus niger)
Hoary Cress; Globe-podded (Lepidium appelianum)
Hoary Cress; Lens-podded (Lepidium chalepense)
Hoary Cress; Heart-podded (Lepidium draba)
Hound’s-Tongue (Cynoglossum officinale)
Mullein, Common (Verbascum thaspus)
Pepper-grass, Broad-leaved (Lepidium latifolum)
Scabious, Field (Knautia arvensis)
Scabious, Field (Knautia arvensis)
Leafy Spurge (Euphorbia esula)
Tansy, Common (Tanacetum vulgare)
Thistle, Canada (Cirsium arvense)
Toadflax, Dalmatian (Linaria dalmatica)
Toadflax, Yellow (Linaria vulgaris)

Reminder to Residents

If you have Diffuse Knapweed or Scentless Chamomile that you would like to dispose of, you can bring it to the M.D. Shop by the Airport to be incinerated.
Please call before you drop it off to make sure someone is at the building to assist you.

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