The frass is fine to coarse, tightly packed and tends to stick together. Life Cycle and Habits Lyctids attack only large-pored hardwoods such as oak, ash, hickory and mahogany. Pine and soft woods are not normally attacked. Adult beetles can emerge from wood stored in the home and infest structural wood or furniture. Lyctids rarely infest wood older than five years.
Infestations usually result from wood that contained eggs or larvae when placed in the home.
The wood could have been improperly dried or stored. Larvae cause the damage. Maple, beech, popular and pine are especially susceptible to attack. Under favorable conditions of moisture and temperature, infestations may spread upwards into walls and upper levels of the structure, including furniture. Infestations may occur as a result of using infested lumber, or from beetles flying in from outdoors or being carried in on firewood.