Montana State University.
The Center for Invasive Species Management closed in 2015. Archives of relevant materials are available here.
Texas A&M AgriLife Extension.
Michigan Department of Agriculture and Rural Development.
Michigan Department of Natural Resources.
Virginia Department of Forestry.
New York City Department of Health.
Maine Department of Conservation. Maine Forest Service. Forest Health and Monitoring Division.
University of Maine. Cooperative Extension.
Texas State University System.
Maryland Department of Natural Resources.
Michigan Emerging Disease Issues.
Michigan's Invasive Species Program.
New York Invasive Species Clearinghouse.
Cornell University. Forest Health and Invasive Non-native Forest Pests.
New York State Department of Environmental Conservation.