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Noun: spruce gall aphid
  1. 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