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These insects are of a wide variety of insects, which create small holes and sawdust in firewood piles. The many common varieties of species include the termite, carpenter ant, bark beetle, roundheaded borer, flatheaded borer, woodwasps and powderpost beetles. When a woodpile is infested, you will note small piles of sawdust around edges of holes and around the woodpile on the ground. Outdoors you will rarely see the insects that infect it. However, if the woodpile is moved indoors the insects most common to follow are termites, carpenter ants and powderpost beetles, which are also capable of then invading the wooden structure of the home. If this occurs you may see them flying around or crawling near the woodpile, lights and windows. Bark beetles, flatheaded and roundheaded borers and woodwasps typically will emerge from the firewood, but only feed on living or recently felled trees and will not damage household wooden structures.

These insects live mainly outdoors where they infest woodpiles. Often they develop in the woodpiles from their egg or larval stage and emerge in the cut firewood to feed. They are most likely to wander indoors if areas inside are more hospitable than areas outside, such as in times of severe weather. They are also more likely to migrate indoors if areas around the house are suitable places for them to live and breed such as habitats like the woodpile or other wood debris.

Once you note infested firewood outdoors spray the area with chlorpyrifos or diazinon containing insecticide. Wait at least two weeks to burn firewood after an insecticide treatment to avoid the creation of noxious fumes, which may be harmful. Unless you plan to burn firewood within one or two days, do not bring it or store woodpiles indoors. Additionally, leaning the outdoor woodpile against the structure of the home will promote infestation indoors. Always stack woodpiles at least 1 inch away from the structure. Ideally, the woodpile should be 10 feet from the household structure to prevent indoor infestation.