Michigan State University. Diagnostic Services.
See also: Plant Diseases for more fact sheets.
USDA. ARS. Systematic Mycology and Microbiology Laboratory.
University of Georgia. Center for Invasive Species and Ecosystem Health.
Florida Department of Agriculture and Consumer Services. Division of Plant Industry.
See also: Plant Industry Pest Alerts for more pests/diseases
USDA. APHIS. Cooperative Agricultural Pest Survey. National Agricultural Pest Information System.
USDA. Animal and Plant Health Inspection Service.
CABI. Plantwise Knowledge Bank.
USDA. APHIS. Plant Protection and Quarantine.