| 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 assist agencies and practitioners doing noxious weed control throughout the state. |
| Environmental Weeds Action Network (EWAN): A community initiative to tackle the problem of environmental weeds in bushland and waterways in Australia. |
| Environmental Weeds in Australia: Brief introduction to some major environmental weeds in Australia, with photos. |
| Integrated Weed Control: Biological products and consulting services for weed management. Montana. |
| 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. |
| International Survey of Herbicide Resistant Weeds: Information about weeds and their identification, control and herbicide resistance. A global collaborative effort. |
| Iowa State Weed Science: Detailed information and articles covering all aspects of agricultural weed science. |
| King County Noxious Weed List: Weed identification in Washington State, USA. |
| National Weeds Strategy - Weeds of National Significance: Australian site promoting key weed policies, regulations, current issues, national initiatives, research, extension training and personnel. |
| New Jersey Agricultural Weed Gallery: Includes brief details, and photographs of the important weeds of NE United States. |
| Noxious Weeds in the US and Canada: Searchable database of the noxious weed lists for all U.S. states and six southern provinces of Canada. |
| Positions in Weed Science (WeedJobs): Advertises permanent, term, postdoctoral and graduate student positions in weed science. |
| UNL Weedscience: This University of Nebraska program conducts research into herbicides and weed types. Page includes list of publications and news. |
| Virginia Tech Weed Identification Guide: Images and descriptions of many species of terrestrial and aquatic weeds in Virginia. |
| Weed Identification: Key and species accounts for 172 species from the University of Illinois. |
| 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. |
| 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. |
| Weeds Society of Western Australia: Includes scientists, consultants, company representatives, conservationists, other practitioners and members of the public who have an interest in weed management |
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