Listing of Invasive Plants
Prohibited Noxious Weeds
Eradication entails destruction of all reproductive parts; therefore stops the ability to spread. These weeds possess highly competitive characteristics, inherent means for rapid spread, and may pose difficulties for control. These weeds are known to be very serious problems in other countries or provinces, but are not well established here.
Common
Crupina (Crupina vulgaris) 
Diffuse
Knapweed (Centaurea diffusa)
Dodder
(Cuscuta spp.)
Hound's-tongue
(Cynoglossum officinale)
Giant
Burdock (Arctium spp.)
Jointed
Goatgrass (Aegilops cylindrica)
Leafy
Spurge (Euphorbia esula)
Rush
Skeletonweed (Chondrilla juncea)
Spotted
Knapweed (Centaurea maculosa)
Tansy
Ragwort (Senecio jacobaea)
Velvetleaf
(Abutilon theophrasti)
Yellow
Starthistle (Centaurea solstitialis)
Green
Foxtail (Setaria viridis)
Kochia
(Kochia scoparia)
Oxeye
Daisy (Chrysanthemum leucanthemum)
Tartary
Buckwheat (Fagopyrum tataricum)
Russian
Thistle (Salsola kali)
Primary Noxious Weeds
While containment and control does not entail eradication, weeds in this category must be prevented from forming viable seed. These weeds have the potential to spread rapidly and cause major crop losses.
Canada
Thistle (Cirsium arvense)
Perennial
Sow Thistle (Sonchus arvensis)
Common
Toadflax (Linaria vulgaris)
Dalmation
Toadflax (linaria dalmatica)
Scentless
Chamomile (Matricaria maritima)
Annual
Sow Thistle (Sonchus oleraceus)
Wild
Mustard (Sinapsis arvensis)
Nightflowering
Catchfly (Silene noctiflora)
White
Cockle (Lychnis alba)
Secondary Noxious Weeds
Enforcement of the Weed Control Act may be considered by the weed inspector under some circumstances.
Wild
Oats (Avena fatua)
Cleavers
(Galium aparine)
Quackgrass
(Agropyron repens)