These insects sometimes build their nests in solid wood such as weather boarding, railings, supports, and trim of buildings. Their nests are in the form of tunnels three to six inches deep in the wood. The holes are very clean and appear as though they were made by a drill. Damage to wood is seldom extensive. After a few days, plug the holes with plastic wood, putty or a similar material.
All insecticides are poisons.
Read the entire label, including the small print, before opening the container and heed all warnings and cautions. Before treating wood, shut off all pilot lights, do not smoke while applying the insecticide and provide plenty of ventilation. Be careful of any run-off that may cause staining. Store pesticides in their original labeled containers, and preferably under lock and key, out of reach of children, irresponsible people and pets. Dispose of leftover spray materials and empty containers promptly and safely.