What type of damage do wood-boring beetles typically cause?

Wood-boring beetles primarily cause damage by tunneling into wood, which results in small holes on the surface of the infested material. As these beetles lay their eggs within the wood, the larvae burrow through it as they develop, creating extensive networks of tunnels that can compromise the integrity of the wood over time. The presence of frass, which consists of the fecal matter and wood shavings produced by the larvae as they feed, is a clear indicator of their activity. This combination of small holes and frass is characteristic of the damage caused by wood-boring beetles, making this the correct identification of their impact on wood structures.