2 Colo. Code Regs. § 406-9-A
I. States and Provinces Participating in the North American Weed Free Forage Program
A. The states and provinces participating in the North American Weed Free Forage Program are: Alabama, Alaska, Arizona, California, Colorado, Montana, North Dakota, South Dakota, Minnesota, Michigan, Missouri, Nebraska, North Carolina, New Mexico, Ohio, Oregon, Kansas, Kentucky, Wyoming, Iowa, Idaho, Indiana, Illinois, Utah, Nevada, Wisconsin, Washington and Alberta (Canada).
II. Noxious Weeds Inspected for by the North American Weed Free Forage Program
A. The following plants are considered to be noxious weeds subject to certification under the North American Weed Free Forage Program.
Absinth Wormwood (Artemisia absinthium) | Perennial sorghum (Sorghum almum) |
Bermudagrass (Cynodon dactylon) | Perennial sowthistle (Sonchus arvensis) |
Buffalobur (Solanum rostratum) | Plumeless thistle (Carduus acanthoides) |
Canada thistle (Cirsium arvense) | Poison hemlock (Conium maculatum) |
Common burdock (Arctium minus) | Puncturevine (Tribulus terrestris) |
Common crupina (Crupina vulgaris) | Purple loosestrife (Lythrum salicaria) |
Dalmation toadflax (Linaria dalmatica) | Quackgrass (Agropyron repens) |
Diffuse knapweed (Centaurea diffusa) | Rush skeletonweed (Chondrilla juncea) |
Dyers woad (Isatis tinctoria) | Russian knapweed (Centaurea repens) |
Field bindweed (Convolvus arvensis) | Scentless chamomile (Anthemis arvensis) |
Hemp (marijuana) (Cannabis sativa) | Scotch broom (Cytisus scoparius) |
Henbane, Black (Hyoscyanmus niger) | Scotch thistle (Onopordum acanthium) |
Hoary cress (Cardaria spp.) | Silverleaf nightshade (Solanum elaeagnifolium) |
Horsenettle (Solanum carolinense) | Skeletonleaf bursage (Ambrosia tomentosa) |
Houndstongue (Cynoglossum officinale L.) | Spotted knapweed (Centaurea maculosa) |
Johnsongrass (Sorghum halapense) | Squarrose knapweed (Centaurea virgata) |
Jointed goatgrass (Aegilops cylindrica) | St. Johnswort (Hypericum perforatum) |
Leafy spurge (Euphorbia esula) | Sulfur cinquefoil (Potentilla recta) |
Loosestrife (Lythrum salicaria L.) | Syrian beancaper (Zygophyllum fabago L.) |
Matgrass (Nardus stricta) | Tansy ragwort (Senecio jacobaea) |
Meadow knapweed (Centaurea pratensis) | Toothed spurge (Euphorbia dentata) |
Medusahead (Taeniatherum caput-dusae) | Yellow hawkweed (Hieracium pratense) |
Milium (Milium vernale) | Yellow starthistle (Centaurea solstitialis) |
Musk thistle (Carduus nutans) | Yellow toadflax (Linaria vulgaris) |
Orange hawkweed (Hieracium auranthiacum) | Common tansy (Tanecetum vulgare) |
Oxeye daisy (Chrysanthemum leucanthemum) | Wild proso millet (Panicum miliaceum) |
Perennial pepperweed (Lepidium latifolium) | Wild Oats (Avena fatua) |
2 CCR 406-9-A