Some ways to get rid of powderpost Beetles include surface treatments and fumigation. These methods are very also useful in controlling other species of wood-boring beetles that may be present.
Pesticides containing borate can be used to treat the surface area of exposed wood. The borate-containing product penetrates the wood, getting rid of the beetles. The pesticide keeps the insects from causing any further damage to the wood as they mature.
In fumigation, gaseous pesticides fill a confined space. The gaseous pesticide poisons and suffocates the pests that are in the confined space, including powderpost beetles that have spread to the floors and the walls.