Bear Lodge Project – Bull Hill Mine
January 2013
Weed Management Plan
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13) Scotch thistle (
Onopordum acanthium
)
14) Musk thistle (
Carduus nutans
)
15) Common burdock (
Arctium minus
)
16) Plumeless thistle (
Carduus acanthoides
)
17) Dyers woad (
Isatis tinctoria
)
18) Houndstongue (
Cynoglossum officinale
)
19) Spotted knapweed (
Centaurea maculosa
)
20) Diffuse knapweed (
Centaurea diffusa
)
21) Purple loosestrife (
Lythrum salicaria
)
22) Saltcedar (
Tamarix
spp.)
23) Common St. Johnswort (
Hypericum perforatum
)
24) Common tansy (
Tanacetum vulgare
)
25) Russian olive (
Elaeagnus angustifolia
)
Declared Weed
: This is “any plant which the Wyoming Board of Agriculture and the Wyoming
Weed and Pest Council have found, either by virtue of its direct effect or as a carrier of disease or
parasites, to be detrimental to the general welfare of persons residing within a district” (i.e., county
weed and pest control district) (WWP 1973).
The 2012 Declared Weed List for Crook County (Wyoming Weed and Pest 2012) includes the six
species listed below:
1)
Black henbane (
Hyoscyamus niger
)
2)
Bull thistle (
Cirsium vulgare
)
3)
Great plains yucca (
Yucca glauca
)
4)
Wild licorice (
Glycyrrhiza lepidota
)
5)
Common mullein (
Verbascum thapsus
)
6)
Sulphur cinquefoil (
Potentilla recta
)
Weed of Concern
: Refers to any plant that is typically not native to the county or region and which
under the right conditions can be invasive.
The Weeds of Concern List for the BHNF/BRD (BHNF 2012) includes the two species listed below:
1)
Cheatgrass (
Bromus tectorum
)
2)
Japanese brome (
Bromus japonicus
)
Invasive Weed
: Refers to a “species that is non-native to the ecosystem under consideration and
whose introduction causes or is likely to cause economic or environmental harm or harm to human
health” (US 1999). Invasive weeds include not only weeds of concern, but designated noxious
weeds, declared weeds, and other plants that are not native to this country.
4.0
PURPOSE AND NEED
