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U.S. Department of Agriculture
National Invasive Species Information Center
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Invasive Species Resources

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New York Invasive Species Research Institute - Expert Database
Cornell University. College of Agriculture and Life Sciences.
Ohio State Ask an Expert
Ohio State University.
Ask an Expert is an online system for asking questions and receiving expert answers quickly on a broad range of subjects. We are pleased to provide university research-based information to help improve the quality of your life, family, garden, business or community! You may submit a question here to be answered by members of our Ohio State University Extension faculty/staff or our Master Gardener Volunteers.
Oregon - Ask about Agriculture
Oregon Department of Agriculture.
Sudden Oak Death - Contacts
California Oak Mortality Task Force.