The Bugwood Network
Canada thistle
Magnoliopsida > Asterales > Asteraceae > Cirsium arvense (L.) Scop.

Identification, Biology, Control and Management Resources
Plant Invaders of Mid-Atlantic Natural Areas - National Park Service and U.S. Fish and Wildlife Service
Biological Control of Invasive Plants in the Eastern United States - USDA Forest Service

Selected Images from
Photographer:Norman E. Rees, USDA ARS
Resolutions:768x512 - PowerPoint/Web
1536x1024 - Print
Photographer:Dan Tenaglia,
Resolutions:768x512 - PowerPoint/Web
Description:Infestation in canola field
Photographer:Alec McClay, Alberta Research Council
Resolutions:768x512 - PowerPoint/Web
1536x1024 - Print
Description:Distribution Map
Source:USDA NRCS, The PLANTS Database, September, 2003

Invasive and Noxious Weed References

  • Invasive Exotic Plant Species of Management Concern, USDA Forest Service, Southern Region, May 18, 2001 -
  • Invasive Plant Atlas of New England -
  • Arkansas State Plant Board, Regulations on Plant Diseases and Pests, September 1997 -
  • Mehrhoff, L.J., K.J. Metzler, & E.E. Corrigan. 2003. Non-native and potentially invasive vascular plants in Connecticut. Center for Conservation and Biodiversity, University of Connecticut, Storrs. -
  • Delaware Department of Agriculture. 1982. Rules and Regulations for Noxious Weed Control. Delaware Department of Agriculture.
  • Bureau of Environmental Programs. 1994. Illinois Noxious Weed Law and Rules. Illinois Department of Agriculture.
  • Annotated Code of Maryland. 1994. Weed Control. State of Maryland.
  • Revised Statues of Missouri. 1992. Insect Pests and Weeds. Missouri Department of Agriculture.
  • North Carolina Department of Agriculture, Plant Industry Division, Noxious Weed Regulations -
  • Ohio Department of Agriculture. 1997. Noxious Weeds. Ohio Department of Agriculture.
  • Pennsylvania Department of Agriculture. 1997. Summary of Plant Protection Regulations. Pennsylvania Department of Agriculture.
  • Tennessee Exotic Pest Plant Council. Invasive Exotic Pest Plants in Tennessee. May 2001.
  • Invasive Alien Plant Species of Virginia -
Taxonomic Reference
USDA, NRCS. 2002. The PLANTS Database, Version 3.5 ( National Plant Data Center, Baton Rouge, LA 70874-4490 USA.

USDA Forest ServiceUSDA APHIS PPQThe Bugwood Network University of Georgia Bargeron, C.T., D.J. Moorhead, G.K. Douce, R.C. Reardon & A.E. Miller
(Tech. Coordinators). 2003. Invasive Plants of the Eastern U.S.:
Identification and Control. USDA Forest Service - Forest Health
Technology Enterprise Team. Morgantown, WV USA. FHTET-2003-08.