Asian longhorned beetle is native to China and other nearby Pacific Rim countries. It was introduced in Chicago, Illinois and the New York City area through solid wood packing material from China. Domestically, movement of infested tree-based materials, including logs and firewood, can easily spread this insect. It is known to attack at least 18 species of hardwood trees including maple, birch, horse chestnut, poplar, willow, elm, ash, and black locust. Adult females chew out a place to lay their eggs forming oval to round, darkened wounds in the bark. Eggs are laid singly and they secrete a substance that hardens over and protects the egg. Larvae develop out of the eggs and chew banana-shaped galleries into the heartwood, on which they will feed in during fall and winter. The pale-yellow larvae are worm-like, elongate, and cylindrical with a varied texture on the underside; the eighth segment of the abdomen has a protruding structure. Pupae are off-white, 1 to 1 1/4 inch long and 1/3 of an inch wide. Adults emerge during the spring through large round holes (3/8" diameter) that may occur anywhere on the tree including branches, trunk, and exposed roots. These exit holes can number in the thousands per tree. Adult beetles 1 to 1 1/2 inches long, shiny-black with white spots. They have black-and-white banded antennae that are at least as long as their bodies. The upper sections of the legs of the adults are whitish-blue. Asian longhorned beetle can be distinguished from related species, such as citrus longhorned beetle, by the markings on the wing covers and the pattern of the antennae. Asian longhorned beetles require between one to three years to reach maturity.


Asian longhorned beetle

Anoplophora glabripennis (Motschulsky, 1853)

Identification, Biology, Control and Management Resources

Program Aid - USDA APHIS PPQ
Fact Sheet - USDA APHIS PPQ
Special Report - National Hardwood Lumber Association
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Web site - USDA Forest Service
Web site - USDA APHIS PPQ
National Agricultural Pest Information System - Cooperative Agricultural Pest Survey


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