Beetle Infestation in a Wooden Sculpture: Identification and Safe Eradication

A valuable wooden sculpture, stored indoors over winter, began producing fresh sawdust from tiny holes. Initially identified as a pine sawyer beetle by Purdue University, the expert re-evaluated the evidence: the small, elongated emergence holes and seasoned wood pointed to powderpost beetles, not pine sawyers (which attack recently dead trees and make larger holes).

However, a follow-up photo showed holes the diameter of a pencil—consistent with pine sawyers. The good news: pine sawyers do not reinfest seasoned wood. Once the adults emerge, the infestation ends. They won't spread to the home or landscape plants.

Treatment options: Freeze the sculpture for several days or heat it to 140°F to kill any remaining larvae. Then simply patch the emergence holes and refinish the surface. No further chemical treatment is needed.