newscheck trees august asian longhorned beetle

Check trees in August for the Asian Longhorned Beetle


asian longhorned beetleAlthough the Asian longhorned beetle has not been found in Virginia, the Virginia Department of Agriculture and Consumer Services encourages residents to check for this invasive pest by looking for signs in their trees and firewood transported from other states.

To minimize further spread of the beetle, VDACS advises residents who see signs of the ALB to document, capture and report the insect to VDACS or the U.S. Department of Agriculture’s Animal and Plant Health Inspection Service.   

The ALB has the potential to destroy millions of acres of America’s treasured hardwoods, including maple, birch, elm, willow, ash and poplar trees, just to name a few. The beetle is slow to spread on its own during the early stages of an infestation, so early detection and reporting is critical to containing it. People can also help by not moving firewood, which can transport the beetle hidden beneath the bark, to new areas.

The ALB has distinctive markings that are easy to recognize:

  • Long antennae with black and white bands, longer than the insect’s body.
  • A shiny, jet black body, about 1-1 ½ inches long, with white spots.
  • ix legs with possible bluish-colored feet.

Signs of ALB infestation include:

  • Perfectly round exit holes, about the size of a dime or smaller, in tree trunks and branches.
  • Shallow oval or round scars in the bark, where the adult beetle has chewed an egg site.
  • Sawdust-like material, called frass, on the ground around the tree or in the ALB exit holes found in the tree trunk and branches.
  • Dead branches or limbs falling from an otherwise healthy-looking tree.

What to do if you see signs of the ALB:

The Asian longhorned beetle, an invasive insect from Asia, has no natural enemies here. Since its discovery in the U.S. in 1996, it has led to the loss of more than 160,000 trees in forests, parks and neighborhoods. Once infested, trees will die and need to be removed.



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