Council or Task Force
Fact Sheet: Spotted Knapweed (Jan 2014; PDF | 794 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.
Least Wanted: Alien Plant Invaders of Natural Areas Fact Sheet - Spotted Knapweed
Plant Conservation Alliance. Alien Plant Working Group.
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 Knapweed (Apr 2005, 3rd Ed; PDF | 2.85 MB)
Forest Health Technology Enterprise Team.
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 - Centaurea genus
California Department of Food and Agriculture.
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 Plants fact sheets (scroll to view) 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.
Best Management Practices: Spotted Knapweed (Feb 2010; PDF | 303 KB)
King County (Washington). Noxious Weed Control Program.
Wisconsin Department of Natural Resources.
Diffuse and Spotted Knapweed
Colorado State University. Cooperative Extension.
and Diffuse Knapweed - Noxious Weeds of Nebraska (PDF | 1.11 MB)
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.
Spotted Knapweed - Aliens Among Us
Royal British Columbia Museum (Canada).