They strip the bark from the trunk and branches and burn it in the fall or winter when the beetles are working in the bark and can be destroyed most easily.

If the infection of trees extends over a large tract, and there is a nearby market for the lumber the timber is sold as soon as possible.

Trap trees are also used in controlling certain species of injurious forest insects.

Certain trees are girdled with an ax so that they will become weakened or die, and thus provide easy means of entrance for the insects.

The beetles swarm to such trees in great numbers.