Animal and Plant Health Inspection Service – The Animal and Plant Health Inspection Service (APHIS) is responsible for protecting and promoting United States agricultural health, administering the Animal Welfare Act, and carrying out wildlife damage management activities.

AQUAPLANT – This web site was designed to help pond owners and their advisors in the identification and management of aquatic vegetation.

Aquatic Ecosystem Restoration Foundation – A nonprofit, tax-exempt foundation created to conduct and support applied research in the management of aquatic pest species, with a focus on nuisance vegetation. The corporation supports research for the control of aquatic weed species and exotic plants such as Eurasian water milfoil, hydrilla, water hyacinth, purple loosestrife, and other aquatic weeds found in lakes, ponds, reservoirs, rivers and streams.

Aquatic Nuisance Species Task Force – An intergovernmental organization dedicated to preventing and controlling aquatic nuisance species.

Aquatic Plant Information System Online – The APIS system includes information on plants, herbicide selection, biological control, mechanical control, and ecology. Simulation models are included.

Aquatic, Wetland and Invasive Plant Information Retrieval System – Information on freshwater aquatic and wetland plants, as well as terrestrial and aquatic invasive plants, including annotated citations for more than 60,000 research articles, books and reports about plant ecology, physiology, utilization and control.

California Noxious Weed Control Projects Inventory – The emphasis of the database is on weeds considered noxious by the California Department of Food and Agriculture or a threat to wild lands by the California Exotic Plant Pest Council.

Center For Aquatic and Invasive Plants – The University of Florida Center for Aquatic and Invasive Plants and the Aquatic, Wetland, and Invasive Plant Information Retrieval System.

Council for Agricultural Science and Technology

Ecology and Biology of Invasive Plants Program – The Invasive Plants website contains information on invasive plants, their impact on native species, and their control (particularly biological control).

Federal Noxious Weeds Database – Database contains scientific names, family names, synonyms, common names, diagnostic characteristics, habitats, and distribution.

Fire Effects Information System (FEIS) – Literature reviews of botanical characteristics, life cycle, habitat, succession, distribution, impacts, fire ecology, and fire effects for 1000 plant and animal species, including 67 non-native invasive species.

Florida Department of Environmental Protection – Aquatic plant management information.

Florida Exotic Pest Plant Council – Goals include building public awareness about the serious threat invasive plants pose to native ecosystems, securing funding and support for control and management of exotic plants, and developing integrated management and control methods to prevent the spread of exotic pest plants throughout the United States.

Global Compendium on Weeds – Hawaiian Ecosystems at Risk (HEAR) – At this website, you may search for a species of plant to check whether one or more of nearly 300 references lists that species as having weedy tendencies. This website previews information in an upcoming publication tentatively entitled A Global Compendium of Weeds. It contains references to approximately 20,000 taxa of plants, citing information about “weedy” characteristics of each based on information in nearly 300 references.

Global Invasive Species Database – Contains invasive species information supplied by expert contributors from around the world.

Integrated Taxonomic Information System (ITIS) – Authoritative taxonomic information on plants, animals, fungi, and microbes of North America and the world.

Invaders Database – Comprehensive database of exotic plant names and weed distribution records for five states in the northwestern United States

Invasive and Exotic Weed Species of North America – Invasive.org – Species lists can be searched by state or species at this invasive weeds of North America site.

Invasive Plants of Canada – Canadian Botanical Conservation Network has prepared a comprehensive list of invasive plant species found in Canada, including a description of each, and control methods for small scale invasions.

Invasive Plants of the Thirteen Southern States – This is a compilation of invasive plants listed by any of the 13 Southern States and those by federal agencies pertaining to these States as of December 2002. Plants listed include those from the Federal Noxious Weed List as of September 2000, State laws (denoted as Laws), and State exotic pest plant councils (denoted as Lists). Those invasive plants in Florida on other State laws and lists are included in the overall compilation, while species only on Florida laws and lists are in a later separate listing.

InvasiveSpecies.gov – A gateway to federal and state invasive species activities and programs.

Marine Invasions Research Lab – The ecology of aquatic invasions: Vectors, impacts, risk assessment and response.

North American Lake Management Society – The purpose of the Society is to assist in the management of aquatic vegetation, to provide for the scientific and educational advancement of members, to encourage scientific research in all facets of aquatic plant management, to promote an exchange of information among members, and to extend and develop public understanding in the discipline. The North American Lake Management Society’s mission is to forge partnerships among citizens, scientists, and professionals to foster the management and protection of lakes and reservoirs for today and tomorrow.

Northeastern Illinois Invasive Plant Partnership Hydrilla Hunt – Join the fight against this highly invasive aquatic plant.

Plant Camp – An invasive species summer workshop for teachers only

Plants Database – View federal and state noxious weed lists, an invasive plant list, or an introduced plant list, each with links to more information.

Plant Threats to Pacific Ecosystems – Pacific Island Ecosystems at Risk (PIER) – Lists of plant species that are invasive (or potentially invasive) on Pacific islands.

South Carolina Department of Natural Resources – Aquatic Nuisance Species Program – The South Carolina Department of Natural Resources in conjunction with the Aquatic Plant Management Council is responsible for the management of nuisance aquatic vegetation in public waters. Each year an Aquatic Plant Management Plan is developed which identifies aquatic weed problem areas, describes management objectives, prescribes management strategies, and determines funding needs and sources.

United States Geological Survey Non-indigenous Aquatic Plant Distribution Information – Diverse in form and habit, many aquatic species have become established in the United States outside of their natural range. Introduced intentionally or escaping from cultivation, non-indigenous plants can colonize aquatic communities where they compete with and often displace native species. Hydrilla (Hydrilla verticillata), water-hyacinth (Eichhornia crassipes) and Eurasian water milfoil (Myriophyllum spicatum) are examples well known for their ability to alter physical and biological functions of aquatic systems.

United States Department of Agriculture – Exotic and Invasive Weed Research Unit – As exotic plants spread rapidly across North America and dominate new areas, they displace desirable plants that provide valuable forage for livestock and wildlife, eliminating critical habitats and affect other natural resources (including water) that are important for threatened and endangered species as well as agricultural production.

Washington’s Freshwater Aquatic Plants Database – Includes native and non-native species.

Weed Control Methods Handbook Online! – This online handbook contains information about weed control methods. Consisting of seven chapters and six appendices, it reviews manual, grazing, fire, biocontrol, and herbicide techniques. There are discussions of eleven different herbicides, plus supporting information on herbicide use.

Weed Management Guide – Principles of weed management, herbicide application equipment and techniques, herbicides, weed management in fruit and nut crops, weed management in field crops and pasture grasses, weed management in ornamentals and turf, weed management in vegetable crops, and other miscellaneous weed management topics are some of the areas discussed within this site.

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 – The Society was established to encourage and promote the development of knowledge concerning weeds and their impact on the environment. The society membership currently consists of approximately 2,000 scientists worldwide. The Society publishes two journals, Weed Science and Weed Technology.

Wisconsin Manual of Control Recommendations for Ecologically Invasive Plants – These guidelines primarily refer to control methods in natural areas, but are not restricted to such areas. Native plants should be protected and encouraged to grow in urban, suburban, and rural lands, not just in protected natural areas. Individuals involved in land management, from parks personnel and public land managers to road crews to private landowners, will find these recommendations useful in efforts to promote balanced and diverse ecological communities throughout Wisconsin, from state parks and scenic river ways to roadsides and backyards.