Asian Longhorned Beetle
Michael Bohne, Bugwood.org - Adult Asian Longhorn Beetle
Dennis Haugen, USDA Forest Service, Bugwood.org - ALB egg pits and exit hole
Kenneth R. Law, USDA APHIS PPQ, Bugwood.org - ALB Life Stages
Why we care: This large, showy beetle was accidentally introduced into the U.S. on several occasions, probably in wood crating or pallets shipped from Asia. Larvae feed in tunnels (called galleries) in the wood of tree branches and trunks. The galleries can cause branches or trees to break and will eventually kill the tree. North American trees have little or no resistance to infestation.
What is at risk? Maple trees are the Asian longhorned beetle’s (ALB) favorite host. More than 1 billion maple trees grow in Michigan. ALB can attack and kill many other tree species, including poplar, willow, sycamore, and horse chestnut.
The threat: ALB populations are known to be present in areas of southern Ohio, Massachusetts and New York. ALB can be transported into new areas in logs and firewood. If ALB is not eradicated and populations spread across North America, the economic and ecological impacts would be enormous.
What could happen in Michigan? If a new ALB infestation is found, federal and state officials will begin survey and eradication activities, including removing and destroying all infested trees. Tree removal is unpleasant, but it has been successful in eradicating ALB populations in New Jersey, Chicago and Toronto. Early detection is critical.
- Michigan Departments of Agriculture & Rural Development and Natural Resources Asian Longhorned Beetle Forest Pest Alert - printable PDF
- Small Format Asian Longhorned Beetle Forest Pest Alert - printable PDF
What Does Asian Longhorned Beetle Look Like, Where Has It Been Found in the U.S., and What Trees Can It Infest?
Asian Longhorned Beetle Look-Alikes
Links of Interest