Pest of the Month -- December

Asian longhorned beetle adult

Asian Longhorned Beetle

The Asian Longhorned Beetle is an extremely destructive pest of hardwood trees such as maple (Norway, sugar, silver, and red), birch, horsechestnut, poplar, willow, elm, ash, and black locust. Look for deep, perfectly round exit holes somewhat larger than the diameter of a pencil. Tree exit holes may ooze sap, and deposits of frass (insect waste and sawdust) may collect at tree trunk and tree limb bases. Egg deposit sites can be found by looking for dime-sized, dimpled impressions in tree bark. Unseasonable yellowing or drooping of leaves when the weather has not been especially dry are also signs that the Asian longhorned beetle may be present. Adults are about 1-1/4 inch long (excluding antennae), shiny black with white spots and black and white striped antennae.

–excerpted from: Asian Longhorned Beetle (Anoplophora glabripennis), USDA/APHIS Factsheet

Asian longhorned beetle larva
Kenneth R. Law, USDA APHIS PPQ, www.invasive.org
Photo credit:  USDA APHIS PPQ Archives, USDA APHIS PPQ, www.forestryimages.org

Original document: 15 December 2005
Last updated: 15 December 2005

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