Wood Beetle Holes
The emergence holes of wood-boring beetles are usually round, but some species produce semicircular or oval holes.
Wood beetle holes. Deathwatch beetles prefer wood that is more moist—greater than Lyctidae, Bostrichidae, Anobiidae, Cerambycidae and Buprestidae (Figure 1). "Woodworm" is something of a misnomer, because the creatures that produce the tiny wormholes that mar wood furniture are actually beetles.
Anobiid beetles attack both hardwoods and softwoods, however the wood attacked is generally old and not newer wood. Most of the insects that live within firewood are of little concern,. Once applied, the gel will permeate throughout the wood yielding the same results as the Boracare.
Longhorned beetle larvae usually live under the bark, in irregular tunnels. It causes more damage in structural timbers and joinery than in furniture. The adult beetles lay their eggs in cracks and holes in the wood and the larvae, or woodworms, eat their way out of the wood over several years.
Firewood often houses beetles, both under the bark and inside the wood. Powderpost beetles and old house borers damage wood slowly, so there is plenty of time to make a decision on control options. Common furniture beetle, anobium punctatum.
You might see other wood-boring bee-. The shape and size of the emergence holes can help identify beetle groups. These beetles lay their eggs in wood, then the larvae, known as woodworms, burrow their way out of the wood as they grow into adults.
Frass is a mixture of powderpost beetle larvae excrement and miniscule wood particles that falls out of the exit holes the adult insects make as they emerge. Boring beetle larvae make winding tunnels loaded with sawdust-like frass. Most species are less than 6mm (1/4 inch) long, but a few reach 25.

