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Northern Research Station
One Gifford Pinchot Drive
Madison, WI 53726
(608) 231-9318
(608) 231-9544 TTY/TDD

Asian Longhorned Beetle

Risk, Detection, and Spread

[photo:] Crates lined up for inspectionEarly detection of new ALB infestations is critical to slow their spread and reduce the time needed for eradication. Accurate delimitation of the area infested by ALB is also critical for regulatory officials who establish quarantine boundaries and eradication areas.  Survey crews rely on signs and symptoms to detect ALB-infested trees: adult exit holes, oviposition pits, sawdust from larval feeding, sap oozing from limbs, and branch die-back. Further improvements are still needed in methods to monitor ALB population levels and to verify that eradication has been successful. In addition, regulatory officials need to know the origin of the ALB infestations to better target their inspection efforts at ports-of-entry to prevent future introductions and to understand better the behavior and biology of existing ALB infestations.

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Last Modified: 07/13/2017