Council or Task Force
Priority Species: Knapweed
Washington State Recreation and Conservation Office. Washington Invasive Species Council.
Fact Sheet: Spotted Knapweed (Jan 2014; PDF | 801 KB)
Alberta Invasive Species Council (Canada).
See also: Fact Sheets for more information about individual invasive species, including those listed as "Prohibited Noxious" and "Noxious" under the Alberta Weed Control Act
Alaska Exotic Plants Information Clearinghouse (AKEPIC): Species Biography - Spotted Knapweed (Feb 7, 2011; PDF | 148 KB)
University of Alaska - Anchorage. Alaska Center for Conservation Science.
See also: Non-Native Plant Species List for additional factsheets (species biographies) and species risk assessment reports of non-native species present in Alaska and also non-native species currently not recorded in Alaska (potential invasives).
Invasive Plant Atlas of the United States - Spotted
University of Georgia. Center for Invasive
Species and Ecosystem Health.
Invasive Species Compendium - Centaurea stoebe subsp. micranthos
Global Invasive Species Database - Centaurea biebersteinii (herb)
IUCN. Species Survival Commission. Invasive Species Specialist Group.
U.S. National Plant Germplasm System - Centaurea stoebe
USDA. ARS. National Genetic Resources Program. GRIN-Global.
and Biological Control of Knapweeds, FHTET-2011-05 (2012; PDF | 45.5 MB)
Forest Health Technology Enterprise Team.
See also: Invasive Species Publications for more publications
Fire Effects Information System (FEIS) - Centaurea maculosa
USDA. FS. Rocky Mountain Research Station. Fire Sciences Laboratory.
PLANTS Database - Spotted Knapweed
USDA. NRCS. National Plant Data Center.
Weeds in Australia -
Spotted Knapweed (Centaurea stoebe subsp. micranthos)
Australian Government. Department of the Environment and Energy.
Encycloweedia: Data Sheet - Centaureagenus
California Department of Food and Agriculture.
See also: Included on California's noxious weed list; see Encycloweedia: Program Details for additional resources
Noxious Weed Species - Spotted & Hybrid Knapweed
Colorado Department of Agriculture. Conservation Services Division. Noxious Weed Program.
Invasive Plants in Pennsylvania: Black, Brown and Spotted Knapweed (PDF | 1.2 MB)
Pennsylvania Department of Conservation and Natural Resources.
See also: Invasive Plant Fact Sheets for plant species (trees, shrubs, vines, herbs and aquatic plants) that have impacted the state's natural lands
Field Guide: Invasive - Spotted Knapweed
Missouri Department of Conservation.
See also: Problem Plant Control (scroll to Invasive Plants section) for more information to help you identify and control most common invasive plants in Missouri
B Noxious Weed: Spotted Knapweed
Washington State Noxious Weed Control Board.
King County (Washington) Noxious Weed Control Program - Spotted Knapweed
King County Department of Natural Resources (Washington).
Water and Land Resources Division.
Wisconsin Department of Natural Resources.
Natural Resources Series: Range - Diffuse and Spotted Knapweed
Colorado State University Extension.
Noxious Weeds of Nebraska - Spotted
and Diffuse Knapweed
University of Nebraska - Lincoln. Cooperative Extension.
Introduced Species Summary Project - Spotted Knapweed
Columbia University. Center for Environmental Research and Conservation.
North Dakota State University. Extension Service.
Ohio Perennial & Biennial Weed Guide - Spotted Knapweed
Ohio State University. Ohio Agricultural Research and Development Center.
Invasive Plant Fact Sheet - Spotted
Knapweed (Nov 2011; PDF |
University of Pennsylvania. The Pennsylvania Flora Project of Morris Arboretum.
See also: Invasive Plant Fact Sheets for additional invasive plants in Pennsylvania
Noxious Weed Information - Spotted Knapweed (B List)
Colorado Weed Management Association.
Weed Identification - Spotted Knapweed
Montana Weed Control Association.
BioBullies - Spotted Knapweed (PDF | 1.7 MB)
Natural Biodiversity (Western Pennsylvania).
See also: Invasive Species Fact Sheets for the worst trouble-makers in the region, and also for additional trouble-makers for you to watch out for