Agriculture & Horticulture Development Board (United Kingdom).
Montana State University.
The Center for Invasive Species Management closed in 2015. Archives of relevant materials are available here.
Michigan Department of Agriculture and Rural Development.
Michigan Department of Natural Resources.
Louisiana State University Agricultural Center. Research and Extension.
North Carolina Department of Agriculture and Consumer Services. Plant Industry Division. Plant Protection Section.
New York City Department of Health.
Cornwall County Council (United Kingdom).
Michigan Emerging Disease Issues.
Michigan's Invasive Species Program.
Mitten Crab Recording Project (United Kingdom).
New York Invasive Species Clearinghouse.
Cornell University. Forest Health and Invasive Non-native Forest Pests.