Picea sitchensis, Belgium, prov. Luxembourg, Chiny, Moyen, early June © Jean-Yves Baugnée
Of the ends of shoot the needles basis are shortened and curved, explaining the American name “ragged spruce gall adelgid”. Contrary to Adelges the thickened needle bases are not fused. The aphids are dark reddish-brown.
In North America on several more Picea species.
Introduced into Europe with Sitka Spruce from North America.
Albrecht (2017a), Cumming (1962a), Dauphin & Aniotsbehere (1997a), Redfern & Shirley (2011a), Roskam (2009a).