Vegetation Management & Weed Control

Mission Statement:  Our mission is to preserve and protect the agricultural, natural, and wildlife habitat areas of Western Colorado by providing leadership and education in the long term management and control of noxious weeds through an integrated, sustainable approach to weed control.

Noxious weeds are presently known to exist in Ouray County.  Weeds are classified according to a state noxious weed priority list:

Classification A:  Eradication is a must.
Classification B:  Manage and control the spread of these species.
Classification C:  Support the use of integrated management methods and provide educational research and biological control resources.

The following are weed species that are present or are of concern to Ouray County (Click on Common Name for picture):

(Some photos courtesy of the United States Department of Agriculture)
Common Name Scientific Name State Class. County Class.
Absinthe Wormwood Atemisia absinthium B B (Priority)
Black Henbane Hyoscyamus niger B B
Bull Thistle Cirsium vulgare B B
Canada Thistle Cirsium arvense B B
Chinese Clematis Clematis orientalis B A (Priority)
Common Burdock Arctium minus C B
Common Mullein Verbascum thapsus C B
Common Tansy Tanacetum vulgare B B
Dame's Rocket Hesperis matronalis B B (Priority)
Diffuse Knapweed Centaurea diffusa B B (Priority)
Downy Brome (Cheat Grass) Bromus tectorum C B
Hoary Cress / Whitetop Cardaria draba B B
Houndstounge Cynoglossum officinale B B
Jointed Goatgrass Aegilops cylindrica B B
Kochia Kochia scoparia C C
Leafy Spurge Euphorbia esula B A (Priority)
Meadow Knapweed Centaurea pratensis A A (Priority)
Musk Thistle Carduus nutans B B
Myrtle Spurge Euphorbia myrsinites A A (Priority)
Oxeye Daisy Chrysanthemum leucanthemum B B
Perennial Pepperweed Lepidium latifolium B B
Plumeless Thistle Carduus acanthoides B B
Poison Hemlock Conium maculatum C B
Purple Loosestrife Lythrum salicaria A A
Quackgrass Elytrigia repens B B
Russian Knapweed Acroptilon repens B B
Russian Thistle Salsosa tragus C C
Salt Cedar / Tamarisk Tamarix chinensis, parviflora, ramossima B B
Scotch Thistle Onopordum acanthium B B
Spotted Knapweed Centaurea maculosa B A (Priority)
Wild Caraway Carum carvi B B
Yellow Starthistle Centaurea solstitialis A A (Priority)
Yellow Toadflax Linaria vulgaris B B