An official website of the United States government.
Japanese Knotweed Resources
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Search Help University of Alaska - Anchorage. Alaska Center for Conservation Science.
See also: Non-Native Plant Species List for additional factsheets (species biographies) and species risk assessment reports of non-native species present in Alaska and also non-native species currently not recorded in Alaska (potential invasives)
USDA. Animal and Plant Health Inspection Service.
The U.S. Department of Agriculture's Animal and Plant Health Inspection Service (APHIS) has issued the final environmental assessment (EA) for releasing Japanese knotweed psyllid (Aphalara itadori) to manage Japanese, giant, and bohemian knotweeds (Fallopia japonica, F. sachalinensis, and their hybrid, F. x bohemica). After careful analysis, APHIS has determined that releasing Japanese knotweed psyllid within the continental United States is not likely to have a significant impact on the environment. Based on this determination, APHIS will not prepare an environmental impact statement and will begin issuing permits for the release of Japanese knotweed psyllid.
USDA. FS. Forest Health Technology Enterprise Team.
FHTET-2017-03. See also: FHAAST Publications for more resources.
Oregon State University. Extension Service.
University of Georgia. Center for Invasive Species and Ecosystem Health.
Provides state, county, point and GIS data. Maps can be downloaded and shared.
California Department of Food and Agriculture.
See also: Included on California's noxious weed list; see Encycloweedia: Program Details for additional resources
New Hampshire Department of Agriculture, Markets, and Food. Division of Plant Industry.
See also: New Hampshire's Prohibited Invasive Plant Fact Sheets for additional invasive trees, shrubs, vines, and herbaceous plants
Pennsylvania State University. Pennsylvania Sea Grant.
See also: Aquatic Invasive Species: Resources for additional species information
USDA. FS. Rocky Mountain Research Station. Fire Sciences Laboratory.
IUCN. Species Survival Commission. Invasive Species Specialist Group.
Pennsylvania State University. Cooperative Extension.
Columbia University. Center for Environmental Research and Conservation.
University of Georgia. Center for Invasive Species and Ecosystem Health.
Indiana Department of Natural Resources. Invasive Plant Species Assessment Working Group.
See also: Species Assessments and Invasive Species for exotic animal and plant pests invading Indiana, causing economic and visual damage
Pennsylvania Department of Conservation and Natural Resources.
See also: Invasive Plant Fact Sheets for plant species (trees, shrubs, vines, herbs and aquatic plants) that have impacted the state's natural lands