The brown spruce longhorned beetle is reportedly a secondary pest (i.e., attacks weakened or recently killed trees, esp. Norway spruce) in Europe, but has readily attacked apparently healthy red spruce in Nova Scotia. Suitability of other New World spruce species is unknown, but both the closely related white & black spruce (and hybrids of those species with red) and/or western species may be at risk. Red spruce often live on sites with relatively poor, shallow soil; as a result, other conifers in the same areas may be stressed and susceptible to attack, especially if numbers of the beetles build up in the red spruce.
Spruce, including red spruce, is an important lumber and pulpwood in the northeastern U.S. Potential effects on western forest industries would be difficult to predict at this point.
The brown spruce longhorned beetle is not known to occur in Indiana.