Pachypappa vesicalis Koch, 1856
on Populus, primary host plant
gall
leaves with large, irregular, often pale, bulges, open to the underside. Often three or more galled leaves in close proximity on the same shoot.
hostplants
Salicaceae, narrowly monophagous
Populus alba, x canescens.
on Picea, Pseudotsuga, secondary host planten
gall
Apterae 0.5-3 mm, pale yellowish white, on thin mycorrhizal root ends with white filamentous wax. Some populations live permanently on the secondary host plant. Not attended by ants.
hostplants
Pinaceae, oligophagous
Picea abies, glauca, sitchensis; Pseudotsuga menziesii.
references
Albrecht (2015a, 2017a), Blackman & Eastop (2014), Börner & Franz (1956a), Buhr (1965a), Carter & Danielsson (1993a), Dauphin & Aniotsbehere (1997a), Heie (1980a), Houard (1908a), Krzywiec (1982a), Redfern & Shirley (2011a), Roskam (2009a), Tomasi (2014a).
mod 24.v.2018