The six-toothed spruce bark beetle is associated principally with spruce, but recorded from the following hosts as well: fir, pine, larch, and infrequently, Douglas-fir. Its specific host, Norway spruce, a Christmas tree and the most widely planted ornamental in the U.S. It is also associated with Scotch pine, another Christmas tree.
The six-toothed spruce bark beetle is considered a secondary pest of conifers, but is capable of damaging live trees when their numbers are high. It also is a secondary pest of stems and crowns of weakened trees.
The six-toothed spruce bark beetle is not known to occur in Indiana.