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Invasive Species Resources

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Pennsylvania State University. Cooperative Extension.
Cornell Laboratory of Ornithology.
Note: Nesting Behavior
Cornell University (New York). New York State Agricultural Experiment Station.
Cornell University. Cooperative Extension of Suffolk County. Horticulture Diagnostic Laboratory.
See also: Tree and Shrub Disease for more fact sheets.

Illinois-Indiana Sea Grant College Program.

Pennsylvania State University. Cooperative Extension.
Pennsylvania State University. Cooperative Extension.
Pennsylvania State University. Cooperative Extension.
South Dakota State University. Agricultural Experiment Station; Cooperative Extension Service.
Pennsylvania State University. Cooperative Extension.
Cornell University. Agriculture and Life Sciences.
This guide provides photographs and descriptions of biological control (or biocontrol) agents of insect, disease, and weed pests in North America. It is also a tutorial on the concept and practice of biological control and integrated pest management (IPM). Whether you are an educator, a commercial grower, a student, a researcher, a land manager, or an extension or regulatory agent, we hope you will find this information useful.
Cornell University Cooperative Extension. Department of Natural Resources.
See also: ForestConnect Fact Sheet Series for more factsheets.
Purdue University. Plant and Pest Diagnostic Laboratory.
See also: Diseases of Ornamentals for more resources
Pennsylvania State University. Cooperative Extension.
Pennsylvania State University. College of Agricultural Sciences. Entomology.
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

University of Florida.

Purdue University Extension. Forestry and Natural Resources (Indiana).
Publication FNR-421-W
See also: Forestry and Natural Resources publications
La Plata National University (Argentina). Invading Mollusks Research Group.

Pennsylvania State University. School of Forest Resources.