The Asian Longhorned Beetle is a destructive pest introduced from Asia, probably in wood packing material. Adults are about 1 to 1½ inches long, shiny black with white spots, 6 legs and long, jointed antennae with white bands. Asian Longhorned Beetles are most active in mid-summer to fall.

Damage From Asian Longhorned Beetles

Larva tunnel into trees, cutting off the flow of water and nutrients, usually killing the tree. Early signs of infestation include yellowing or dropping leaves, oozing sap, dime-size exit holes in trunk and limbs, shallow scars under the bark, sawdust where branches join other branches or at the base of the tree and dead limbs. Trees commonly attacked include birch, goldenrain tree, willow, horse chestnut, elm, katsura tree and especially maples. 

Be on the lookout for damaged trees and adult Beetles, especially in mid- to late summer. Report suspicious findings  at

Where Asian Longhorned Beetles are Found Geographically

Found in select areas of the Northeastern and Midwestern United States, including Indiana, Massachusetts, New Jersey, New York and Ohio. (As of November 2016)

Related or Similar Pests 

Emerald Ash Borer.





Cultural Controls

In quarantined or regulated areas, the USDA recommends the following:

  • Do not move firewood, nursery plants, wood debris or lumber from areas where this pest occurs to prevent it from spreading.
  • Obtain your firewood where you plan to burn it.
  • Allow officials on to your property for inspection and, if necessary, eradication work.
  • Dispose of brush, leaves and twigs of regulated materials that are less than ½ inch in diameter in approved disposal sites. Contact your State ALB Program for a disposal site near you.
  • Don't plant trees that are known hosts. For a list of alternative recommended trees, go to: