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6.0 REFERENCES <br />Beck, K.G. 2000. Canada Thistle. Colorado State University Cooperative Extension Publica- <br />tion 3.108. http://www.co.boulder.co.us/lu/zoning/canada thistle.pdf Available 4 Jan <br />2006. <br />Beck, K.G. Mar 2003. Russian Knapweed. <br />http://www.ext.colostate.edu/pubs/natres/03111.html Available 29 Dec 2005. <br />California Department of Food and Agriculture (CDFA). [no date] Russian knapweed. <br />http://www.cdfa.ca.gov/phpps/ipc/weedinfo/acroptiIon.htm Available 29 Dec 2005. <br />Colorado Department of Agriculture (CDA), Conservation Services Division. Biological Pest <br />Control: Weed Control Programs. <br />http://www.ag.state.co. us/CSD/insectary/weed%20programs. htmI#Canada%20thistle <br />Available 4 Jan 2006. <br />Cooley, A.W. and R. Baird-LeValley. 2000. Canada Thistle Control Following Applications of <br />Curtail and Redeem R&P Herbicides. Colorado State University Cooperative Extension. <br />www.coopext.colostate.edu/TRA/Weeds/CanadaT/canadathistle.html Available 4 Jan <br />2006. <br />Graham, J. and W.S. Johnson. 2004. Managing Russian Knapweed. <br />http://www.unce.unr.edu/publications/FS04/FS0437.pdf Available 29 Dec 2005. <br />Larimer County. Management of Canada Thistle. <br />http://www.co.larimer.co.us/publicworks/weeds/management/MgtCanadaThistle. htm <br />Available 4 Jan 2006. <br />Lym, R.G. Jan 2004. Know Your Knapweeds. <br />http://www.ext.nodak.edu/extpubs/plantsci/weeds/wl 146w.htm Available 29 Dec 2005. <br />Lym, R.G. and R. Zollinger. 2004. Perennial and Biennial Thistle Control. North Dakota State <br />University Extension Service. <br />http://www.ext.nodak.edu/extpubs/plantsci/weeds/w799w.htm Available 4 Jan 2006. <br />U.S. Geological Survey, Northern Prairie Wildlife Research Center. An Assessment of Exotic <br />Plant Species of Rocky Mountain National Park. <br />http://www.npwrc.usgs.gov/resource/plants/explant/cirsarve.htm Available 4 Jan 2006. <br />Walters, C. 1999. Weeds: Control Without Poisons, 2nd ed. Acres U.S.A., Austin, TX. In <br />http://www.co.larimer.co. us/publicworks/weeds/management/MgtCanadaThistle. htm <br />Available 4 Jan 2006. <br />Washington Noxious Weed Control Board, Mar 2005. Russian Knapweed. <br />http://www.nwcb.wa.gov/weed info/Written findings/Acroptilon repens.html Available <br />29 Dec 2005. <br />15 <br />