Massachusetts Invasive Plant Advisory Group.
USDA. APHIS. Cooperative Agricultural Pest Survey (CAPS). National Agricultural Pest Information System (NAPIS).
Provides State pest detection contacts, recent state exotic pest news, links to state pest resources, and a list of state CAPS survey targets.
DOI. National Park Service; NatureServe. Explore Natural Communities.
Potomac Highlands Cooperative Weed and Pest Management Area (West Virginia).