Noun: spruce gall aphid
- A variety of adelgid which is a pest of the Norway spruce and various North American spruces, especially the white spruce and black spruce (Adelges abietis)
"The spruce gall aphid created distinctive cone-like galls on the tree branches";
- Adelges abietis
Derived forms: spruce gall aphids
Type of: adelgid
Part of: Adelges, genus Adelges