Picea sitchensis, Belgium, prov. Luxembourg, Chiny, Moyen, early June © Jean-Yves Baugnée

gall

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.

hostplants

Pinaceae, monophagous

Picea sitchensis.

In North America on several more Picea species.

notes

Introduced into Europe with Sitka Spruce from North America.

references

Albrecht (2017a), Cumming (1962a), Dauphin & Aniotsbehere (1997a), Redfern & Shirley (2011a), Roskam (2009a).