State Government
Scotch Thistle
Arizona Department of Transportation. Intermodal Transportation Division.
Identification/Description; Photographs; Life Cycle; Habitat; Controls; Legal Aspects
Onopordum genus - EncycloWeedia
California Department of Food and Agriculture.
Identification/Description; Photographs; Habitat; Distribution; Dispersion; Controls
Integrated Weed Management of Scotch Thistle (PDF | 171 KB)
State of Colorado. Douglas County. Public Works.
Identification/Description; Photographs; Controls
Scotch Thistle - Noxious Weed Information Series (PDF | 188 KB)
State of Colorado. Jefferson County Weed and Pest Management Program.
Identification/Description; Photographs; Controls
Scotch Thistle
State of Colorado. Larimer County Weed Control District.
Identification/Description; Photographs; Controls
Scotch Thistle - Idaho's Noxious Weeds
Idaho Association of Soil Conservation Districts. Idaho OnePlan.
Identification/Description; Photographs; Introduction History; Distribution; Controls
Scotch Thistle
State of Utah. Weber County Weed Abatement.
Identification/Description; Photographs; Habitat; Dispersion; Controls
Scotch Thistle Identification
State of Washington. King County Department of Natural Resources. Water and Land Resources Division.
Identification/Description; Photographs
Scotch thistle
Washington State Noxious Weed Control Board.
Identification/Description; Photographs; Introduction History; Impacts; Life Cycle; Habitat; Distribution; Controls; Special Note: References |