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Invasive Species Resources

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Purdue University. Plant and Pest Diagnostic Laboratory.
See also: Diseases of Ornamentals for more resources
Virginia Tech; Virginia State University. Virginia Cooperative Extension.
Boxwood blight (also called "box blight" in Europe), caused by the fungal pathogen Cylindrocladium pseudonaviculatum (=C. buxicola), was found for the first time in the United States in North Carolina, Virginia and Connecticut in 2011. The first reported infestation in the U.S. was in a North Carolina nursery and the disease was introduced to Virginia on plants from that nursery. Spread outside the two Virginia locations, both of which are fields owned by a single nursery, has not been reported. However, growers should be aware of the symptoms of boxwood blight and monitor nursery and landscape boxwoods for symptoms.
University of Arkansas. Cooperative Extension Service.
See also: Extension Publications for more resources
Pennsylvania State University. Cooperative Extension.
University of California - Riverside. Center for Invasive Species Research.
Pennsylvania State University. College of Agricultural Sciences. Entomology.
University of Vermont. Forest Pathology.
Louisiana State University. AgCenter Research and Extension.
Citrus canker, a serious disease of citrus, was recently found on trees in East Baton Rouge and Livingston parishes, according to LSU AgCenter plant doctor Raj Singh. Citrus canker is a highly contagious bacterial disease that was first detected around 1914 in Louisiana and declared eradicated by 1940. The disease is known to cause defoliation, premature fruit drop, blemished fruit and tree decline. Severely infected trees ultimately may stop producing fruit. If you believe your citrus trees have citrus canker, contact the U.S. Department of Agriculture at 225-298-5410 or the LDAF Horticulture and Quarantine Division at 225-952-8100
Kansas State University. Agricultural Experiment Station and Cooperative Extension Service.
See also: Weed Management Publications for more resources

eXtension.

Texas A&M University. Texas Forest Service.
See also: Texas Forestry Association's "Dirty Dozen" (scroll to view) for more fact sheets
Washington Sea Grant.

University of California. Agriculture and Natural Resources.

ANR Publication 8218

University of Florida. IFAS. Citrus Extension.

Texas A&M University. AgriLife Extension Service.

See also: Citrus Publications for more resources