USDA. APHIS. PPQ. CPHST. Identification Technology Program.
University of Florida. Institute of Food and Agricultural Sciences Extension.
Electronic Data Information Source Publication #ENY463
European and Mediterranean Plant Protection Organization.
University of Massachusetts Extension. Landscape, Nursery, and Urban Forestry Program.
University of Georgia. Center for Invasive Species and Ecosystem Health.
Australian Plant Biosecurity Cooperative Research Centre. Pests and Diseases Image Library.
North Central Integrated Pest Management Center.
Florida Department of Agriculture & Consumer Services. Division of Plant Industry.
USDA. APHIS. Cooperative Agricultural Pest Survey. National Agricultural Pest Information System.
CABI. Plantwise Knowledge Bank.
University of California. Agriculture and Natural Resources.