Connecticut Agricultural Experiment Station. Plant Disease Information Office.
University of Connecticut. Department of Plant Science and Landscape Architecture.
Texas A&M AgriLife Extension.
University of Connecticut. Connecticut Invasive Plant Working Group.
Texas State University System.
University of New Hampshire. Cooperative Extension; New Hampshire Department of Agriculture, Markets & Food.
Utah Department of Agriculture and Food.
University of New Hampshire. Cooperative Extension.
Texas A&M University. Entomology.