Have a plant or pest question? Questions from Maryland and the District of Columbia are answered by Home and Garden Information Center’s Certified Professional Horticulturists. If you are located outside of these areas, you will be asked to enter your state and county. Your question will be forwarded to the appropriate extension expert.
Invasive Species Resources
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University of Maryland. Cooperative Extension. Home and Garden Information Center.
eXtension is an educational partnership of more than 70 universities to help you improve your life every day with access to objective, research-based information and educational opportunities. Categories include integrated pest management and fire ants. Requires free registration.
See also: Use the One Search service to search the resources provided by your Cooperative Extension Service using a Google Custom Search Engine that includes many of the Cooperative Extension web sites provided by your Land-Grant institutions.
Note: Ask an Expert has been discontinued. The service has transitioned to a new platform with a new name: Ask Extension.
National Plant Diagnostic Network.
First Detector, a program of the National Plant Diagnostic Network (NPDN), equips a nationwide network of individuals to rapidly detect and report the presence of invasive, exotic plant pathogens, arthropods, nematodes, and weeds. If you suspect the presence of a high-impact plant pest or pathogen, contact a diagnostician and submit a sample for diagnosis.
DOI. U.S. Geological Survey; Great Lakes Commission; DOC. National Oceanic and Atmospheric Administration; Great Lakes Fishery Commission.
Aquatic Nuisance Species Task Force.
This database was designed to direct users to invasive species experts. The public portion of the database will guide you to a state contact who acts as a filter for information and identifications.
National Plant Diagnostic Network.
NPDN is a national network of diagnostic laboratories that rapidly and accurately detect and report pathogens that cause plant diseases of national interest, particularly those that could be deemed to be a biosecurity risk. The specific purpose of the NPDN is to provide a cohesive, distributed system to quickly detect and identify pests and pathogens of concern.
USDA. APHIS. Plant Protection and Quarantine.
The National Wildlife Disease Program (NWDP) promotes safe agricultural trade by protecting the health of humans, animals, plants and ecosystems to reduce the levels of incurred losses to agricultural and natural resources. NWDP participates in wildlife disease monitoring and surveillance in all regions of the United States.
North American Native Plant Society.
Local Native Plant Societies are often your best source of information about plants native to your area.
Note: Provides information for State and Canadian Provinces.
This searchable directory includes contact information and self-identified areas of individual expertise for NatureServe, NatureServe Canada, and our Network Programs in the United States, Canada, and Latin America. More than 80 NatureServe Network Programs collect and analyze data about the plants, animals, and ecological communities of the Western Hemisphere. They are the leading source of information on the precise locations and conditions of at-risk species and threatened ecosystems in their jurisdictions. NatureServe collects, curates, and distributes that information for use at regional, national, and international scales. Staff throughout the Network are experts in their fields, and include some of the most knowledgeable field biologists and conservation planners in their regions.
Oregon State University. National Pesticide Information Center (NPIC).
Through its county agents, the Cooperative Extension Service gives individuals access to the resources at land-grant universities across the nation. These universities are centers for research in many subjects, including entomology (the study of insects) and agriculture. Each county within the United States has an Extension office, which is staffed with agents who work closely with university-based Extension specialists to deliver answers to your questions about gardening, agriculture, and pest control.
USDA. Natural Resources Conservation Service.
NRCS offers technical and financial assistance to help farmers, ranchers and forest managers.
National Information System for the Regional IPM Centers.
Provides a searchable database for various key contacts, coordinators and experts.
DOC. NOAA. National Sea Grant Office.