Both species attack oak, hickory, pecan and many other hardwood species.
Damage can be severe in pecan and other fruit tree orchards.
The damage done by these insects can be distinguished from each other by the girdle on the twig or branch. In both situations, however, the result is the same. Both twigs and branches are girdled. A good method of control is to collect the twigs and branches that fall to the ground and burn them. Those hanging in the tree should be collected and burned as well.