Weed Science Society of America  
   Publishers of Weed Technology. Weed Technology includes original research on weed biology and control, weed and crop management systems, reports of new weed problems.
   http://www.wssa.net/

International Parthenium Research News Group  
   Resources on this noxious weed for scientists and researchers. Includes a news group, picture gallery, scientists directory, references and links.
   http://www.iprng.org/

Harney County Noxious Weedboard  
   Information and advice on noxious weeds and their control in Southeastern Oregon.
   http://angelfire.com/or2/SEORNoxiousWeeds/HarneyCounty.html

Weed Research and Information Center  
   An interdisciplinary collaboration that fosters research in Weed Management and facilitates distribution of associated knowledge for the benefit of agriculture and for the preservation of natural resources.
   http://wric.ucdavis.edu/

Integrated Weed Control  
   Biological products and consulting services for weed management. Montana.
   http://www.integratedweedcontrol.com/index.htm

California Noxious Weed Control Projects Inventory  
   A combined government/private/non-profit effort to establish a database, accessible through the Internet, containing information on noxious weed control in California. This information will further the practice and science of noxious weed control and assi
   http://endeavor.des.ucdavis.edu/weeds/

Environmental Weeds Action Network (EWAN)  
   A community initiative to tackle the problem of environmental weeds in bushland and waterways in Australia.
   http://members.iinet.net.au/~ewan/

Environmental Weeds in Australia  
   Brief introduction to some major environmental weeds in Australia, with photos.
   http://www.anbg.gov.au/weeds/weeds.html

King County Noxious Weed List  
   Weed identification in Washington State, USA.
   http://dnr.metrokc.gov/wlr/lands/weeds/weedid.htm

Suppression of Smooth Brome  
   Examines the effectiveness of chemical and non-chemical treatments in reducing smooth brome tiller density at Pipestone National Monument, Minnesota.
   http://www.npwrc.usgs.gov/resource/tools/smthbrom/smthbrom.htm

National Weeds Strategy - Weeds of National Significance  
   Australian site promoting key weed policies, regulations, current issues, national initiatives, research, extension training and personnel.
   http://www.weeds.org.au/natsig.htm

International Survey of Herbicide Resistant Weeds  
   Information about weeds and their identification, control and herbicide resistance. A global collaborative effort.
   http://www.weedscience.com

Positions in Weed Science (WeedJobs)  
   Advertises permanent, term, postdoctoral and graduate student positions in weed science.
   http://www.wssa.net/weedjobs/

Weed Identification  
   Key and species accounts for 172 species from the University of Illinois.
   http://web.aces.uiuc.edu/weedid/

Virginia Tech Weed Identification Guide  
   Images and descriptions of many species of terrestrial and aquatic weeds in Virginia.
   http://www.ppws.vt.edu/weedindex.htm

Iowa State Weed Science  
   Detailed information and articles covering all aspects of agricultural weed science.
   http://www.weeds.iastate.edu/

New Jersey Agricultural Weed Gallery  
   Includes brief details, and photographs of the important weeds of NE United States.
   http://www.rce.rutgers.edu/weeds/