Massachusetts Invasive Plant Advisory Group.
. 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.
. National Park Service; NatureServe. Explore Natural Communities.
Potomac Highlands Cooperative Weed and Pest Management Area (West Virginia).
Northwest Michigan Invasive Species Network.