Universities

• University of California - Weed Research and Information Center
• Colorado State University - Weeds and Weed Management 
• University of Georgia Weed Science 
• University of Illionis, Urbana-Champaign - Weed Identification 
• Iowa State Weed Science 
• University of Maryland Weed Science 
• University of Missouri Weed Science 
• New Mexico State University Weed Science 
• Purdue Herbicide List 
• Rutgers University - weed images 
• Texas A&M - Broad Leaf Weeds 
• Virginia Tech Weed Science 
• Southern Illinois University 
• North Dakota State University - 1997 North Dakota Agricultural Weed Control Guide 
• University of Konstanz 
• University of Queensland, Brisbane-Tropical and Subtropical Weeds Research Unit 

State

• Arizona Rangeland Weeds 
• Control of Invasive Exotic Plants in the Great Plains 
• Idaho's Noxious Weeds- an excellent site for weed identification 
• Kansas Noxious Weeds 
• Michigan - Weeds and Weed Management 
• North Dakota Weed Information 

Federal Government

• BLM Environmental Education 
• Federal FICMNEW - Interagency Committee for the Management of Noxious and Exotic Weeds 
• National Agricultural Pests Information System 
• National Biological Control Institute 
• National Park IPM of Weeds 
• USDA-APHIS Weed Information 
• USDA ARS Weed Science Laboratory (Beltsville) 

International

• Australia - Cooperative Research Center for Weed Management Systems 
• Australia - Environmental Weeds
• Australia and New Zealand-Council of Australasian Weed Societies 
• British Columbia - Alphabetical Index to Noxious and Other Selected Weeds 
• Saskatchewan Agriculture and Food 
• FAO-Weeds - a directory of weed scientists, go under database/directory

Agricultural Chemical Companies

• FMC Corporation Home Page - great site with pictures of weeds and pests 
• FMC Corporation Product Labels 
• Monsanto 
• Rohm and Haas Agricultural Products - products and labels 
• Rohm and Haas Turf and Ornamental Products - products and labels 
• Valent Agricultural Products 

Links to Crop Protection Companies 

• American Cyanamid 
• BASF 
• DowElanco 
• DuPont 
• FMC 
• Hoechst 
• Monsanto 
• Novartis 
• Rohm and Haas 

Organizations

• American Crop Protection Association 
• Colorado Weed Management Association
• Cuban Weed Science Society (Sociedad Cubana de Malezología)

Eng. Luis E. Rivero, President
Rice Research Institute(Instituto de Investigaciones del Arroz)
Autopista Novia del Mediodía km 16 ½,
Bauta, La Habana, Cuba
e-mail: luise@iiarroz.cu
phone: (53)-473550, (537)-8303028

• European Weed Research Society (EWRS)
• Florida Weed Science society (FWSS)  
• International Weed Science Society
• Latin American Weed Science society (Asociación Latinoamericana de Malezas, ALAM)  
• North American Weed Management Association 
• Weed Science Society of Victoria, Australia 
• Weed Science Meetings  
• The Weed Science Society of Japan WSSJ)
• Western Society of Weed Science 
• World Congress of Soil Science (WCSS) 
• International Parthenium Research News Group (IPRNG)
• Canadian Weed Science Society
• Weed Science Society of the Republic of China
• The International Parasitic Plant Society (IPPS)
• Venezuelan Weed Science Society (Sociedad Venezolana de Malezas, SOVECOM)
• Southern African Weed Science Society

Specific Weeds

• Aquatic Weeds 
• Biological Control of Weeds 
• Goatsrue 
• Jointed Goatgrass 
• Biocontrol of Leafy Spurge 
• Biological Control of Purple Loosestrife 
• Yellow Starthistle 

Weeds in Specific Crops

• Aquatic Weeds 
• Biological Control of Purple Loosestrife 
• Cotton Weed Control - in North Carolina 
• Forage Crops Weed Control - in New York State 
• Weeds in Minnesota Wheat 

Miscellaneous

• Council for Agricultural Science and Technology 
• The Composter's Forum 
• The Nature Conservancy's Wildland Weeds 
• CropNet - Weeds 
• MSDS and Herbicide Labels 
• Terms used in Weed Science 
• Federal Interagency Committee for the Management of Noxious and Exotic Weeds. 
• UC Pest Management Guidelines - Weed Photo Gallery 
• International Survey of Herbicide Resistant Weeds 
• HRAC  (Herbicide Resistance Action Committee) 
• IPMnet News (Free monthly electronic newsletter)