Gateway to invasive species information; covering Federal, State, local, and International sources.
USDA, National Agricultural Library
Think your trees are infested with an invasive insect or pathogen? Consult an expert before taking action. Contact your local extension office or a href="http://www.isa-arbor.com/findanarborist/findanarborist.aspx" target="new">find an arborist for verification before removing or treating your trees.
North Carolina State University
Guide to insect systematic resources. The site includes general information; links to insect collections; identification tools; organizations; and educational resources.
ICUN, Invasive Species Specialist Group
A selection of alien species illustrating the variety of species capable of establishing and dominating new places. The species were selected from the Global Invasive Species Database,
USDA, National Agricultural Library, National Invasive Species Information Center
A select list of species of concern, providing examples of the need to increase efforts in early detection and rapid response, for the prevention of new introductions.