Adelges tardus (Dreyfus, 1888)

on Picea

Picea abies, Duitsland, Germany, Triberg, 850 m, 23.vii.2018 © Cor Zonneveld

a single gall

another specimen

gall

ananas gall, strongly resembling the gall of A. laricis, but the gall ripens much later, in August-October. Contrary to laricis the galls occur in groups, mixed with galls from preceding years. The aphids are blackish, with much wool.

host plants

Pinaceae, monophagous

Picea abies, glauca, pungens, sitchensis.

Contrary to A. laricis there is no host alternation.

references

Albrecht (2017a), Béguinot (2002h, 2007b, 2012a), Bellmann (2012a), Börner & Franz (1956a), Buhr (1965a), Covassi & Binazzi (1981a), Dauphin & Aniotsbehere (1997a), Deckert & Deckert (2016a), Hellrigl (2004a), Lehmann & Hannover (2016a), Redfern & Shirley (2011a), Roskam (2009a), Tomasi (2003a, 2012a), Wojciechowski, Depa, Halgoš ao (2016a).