Wood Borers   
Wood borer larvae burrow or tunnel into solid wood. Once developed, they emerge through a conspicuous round hole. Adult instects select weakened or recently cut trees and deposit an egg in a crack or crevice of the bark. The rate of development depends upon such factors as moisture and temperature, and may extend to three or more years. Because of this, it is fairly common for these insects to emerge from a finished log, timber or board in a home - much to the surprise or dismay of the occupant. Processing wood products through a kiln dryer usually destroy all stages of the insect within the wood.
 
Wood borers invade and damage wood furniture as well as structural and decorative wood inside of buildings. The beetle larvae feed in and do most of the damage to wood, and when they reach the adult stage, they emerge through round exit holes, which they create by chewing through the wood surface. Adults of some species also bore exit holes through plaster, plastic, and even soft metals that might cover the underlying wood.

You might see other wood-boring beetles such as fatheaded or round-headed  borers and bark or ambrosia beetles in your home if you store infested firewood inside. However, these typically are forest insects that won’t attack wood structures or furniture. They begin their life cycles on declining trees that are old or that have sustained fire or insect damage. Sometimes these forest insects are present in trees when they are milled into wood products, and they might cause alarm when they emerge from infested wood used in newly constructed buildings. However, they aren’t able to re-infest the wood in these structures.

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