Pachypappa tremulae (Linnaeus, 1761)

aspen-spruce aphid

on Populus, primary host plant

gall

leaf nests, caused by the curving of alle petioles on a dwarf shoot.

host plants

Salicaceae, (narrowly?) monophagous

Populus tremula.

Blackman & Eastop, and Heie only cite tremula; other authors add alba and x canescens.


on Picea, secondary host plant

gall

Apterae 0.5-3 mm, pale, on thin mycorrhizal root ends. Some populations live permanently on the secondary host plant. Not attended by ants.

hostplants

Pinaceae, monophagous

Picea abies, orientalis, sitchensis.

synonyms

Asiphum, Asiphon, Schizoneura, tremulae.

references

Albrecht (2015a, 2017a), Blackman & Eastop (2014), Börner & Franz (1956a), Buhr (1965), Carter & Danielsson (1993a), Dauphin & Aniotsbehere (1997a), Heie (1980a), Hellrigl (2004a), Houard (1908a), Lampel & Meier (2003a), Masłowski, Ledwoń, Wyglenda ao (2017a), Redfern & Shirley (2011a), Stroyan (1975a), Szelegiewicz (1982a), Tambs-Lyche & Heie (1994a), Weis (1955a).

mod 25.v.2018