The blue spruce is attacked by two species of Adelges, an aphid-like insect that causes galls to form.
The Adelgid (genus Adelges) are pear-shaped, soft-bodied green insects with long antennae, closely related to the aphid.
Adelges |
The species is severely damaged by a non-native insect, the Balsam woolly adelgid (Adelges piceae).