Pachypappa populi (Linnaeus, 1758)
on Populus, primary host plant
gall
large upwards embossments of the leaf disk, pale green, yellowish to somewhat reddish. The galled leaf is one at the base of a young shoot; the leaves above have turned fiery red.
hostplants
Salicaceae, narrowly monophagous
Populus tremula.
on Picea, secondary host plant
gall
Apterae 0.5-3 mm, pale, on thin mycorrhizal root ends, in large colonies covered by flocculent wax. Some populations live permanently on the secondary host plant. Not attended by ants.
hostplants
Pinaceae, monophagous
Picea abies.
synonyms
Pachypappella populi; Pachypappa grandis Tullgren, 1925.
references
Albrecht (2015a, 2017a), Béguinot (2012a), Blackman & Eastop (2014), Börner & Franz (1956a), Buhr (1965a), Danielsson (1974a), Heie (1980a), Tomasi (2014a).
Last modified 22.iv.2023