Pest Library – WDI – Powder Post Beetles

Facts: Powderpost Beetles

Family:

Lyctinae

Appearance: Brown to reddish-brown in color, Powderpost beetles are usually 1/8 to 1/4 inches in length. Their presence is often determined by the 1/8 inch diameter exit holes that they leave behind. The exit holes are more commonly seen that the insect itself.

Habit: Powderpost beetles are often found in stored lumber, finished wood, furniture, and wooden rafters. They lay eggs on seasoned hardwoods and the young will burrow into the pores of the wood. They feed on the wood itself until they are fully grown and then exit the wood by burrowing back out. They eat only untreated wood, making antiques and old furniture especially desirable. They will often emerge from finished wood products, to the surprise of homeowners who have recently done home renovations or installed new wooden doors or hardwood furnishings.

Diet: Hard-woods/Sap-woods

Reproduction: Eggs are usually deposited in the spring time on seasoned lumber. The larvae look like small, white grubs and produce a powdery saw dust as they feed on the wood. They stay in the selected piece of wood through out the winter and emerge the next spring, leaving their distinct exit holes. A large infestation of these pests can cause irreversible damage to wood furnishings.


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