- Hosts: hardwood trees (primarily genera Acer, Populus, Salix, and Ulmus, but also Aesculus, Albizia, Betula, Cercidiphyllum, Fraxinus, Platanus, Prunus, and Sorbus). Acer is the most common.
- Distribution: Native to China and Korea. First discovered in the U.S.in 1996. Has been found in New York, Calfornia, Washington State, Illinois, and New Jersey.
- Symptoms: Dead trees due to larva tunnels under the bark and deep into the tree. Early symptoms – sap leaking from the tree, sudden dieback of larger branches.
- Signs: Round exit holes ~3/8” diameter on trunks and branches, frass at the base of infested trees or branch crotches.
- Management: ALB is not currently established in the western U.S. Early detection, reporting, and eradication is important to prevent its establishment.
Source: Regional Pest Alert Asian Long-Horned Beetle (ALB), USDA-CSREES Integrated Pest Management Centers in cooperation with the University of California Statewide Integrated Pest Management Program; the National Plant Diagnostic Network, Western Region; USDA APHIS; USDA Forest Service; California Department of Food and Agriculture; and the Sacramento County Agricultural Commissioner.
Asian Long-Horned Beetle. Photo courtesy University of California, Riverside.
