Centaurea solstitialis L. (Yellow Starthistle)
- The plant's origins and biology, current infestation levels in Washington, extensive list of print references. From the Washington State Noxious Weed Control Board.
- http://www.nwcb.wa.gov/weed_info/Written_findings/Centaurea_solstitialis.html

Centaurea solstitialis (Yellow Starthistle)
- Stewardship document provides history of the plants' migration from Eurasia to the Americas, biological description, associated ecological problems, management tactics, extensive bibliography and several detailed photographs. From The Nature Conservancy.
- http://tncweeds.ucdavis.edu/esadocs/centsols.html

Progress in Yellow Starthistle Biological Control
- USDA site reports positive results on field tests using Eustenopus villosus weevils to control starthistle in Idaho.
- http://www.ars.usda.gov/is/pr/1999/990222.htm

Yellow Starthistle - UC Pest Management Guidelines
- University of California guidelines for control of Yellow Starthistle, including identification and biology.
- http://www.ipm.ucdavis.edu/PMG/PESTNOTES/pn7402.html

Yellow Starthistle Information
- Extensive site provides detailed information about the weed, including origins, impacts, biology, management options, associated legislation and references. From the UC Davis Weed Research and Information Center.
- http://wric.ucdavis.edu/yst/

Fact Sheet No. 1: Yellow Starthistle
- Photographs and information about the origins of the plant and the problems it causes. Analysis of several control measures. From University of California Cooperative Extension.
- http://danr.ucop.edu/uccelr/range01.htm

Yellow Starthistle Biology and Control
- Origins, life cycle, photographs, and analysis of several means of controlling this pest.
- http://cecalaveras.ucdavis.edu/starthistle.htm