Wood borers are one of the most injurious wood destroying insects, for many wooden structures. The larva bores through wood and also feeds on it. Tunnels made by the larva weaken structural timbers over time and unless treated by a professional; they will not stop. Infestations are hard to detect in the early stages since larvae are small and develop slowly the first year and there are no external signs of damage. Only in advanced stages will surfaces bulge or tiny oval exit hole created by the borer may appear and fine powder may fall from these holes.