Pterocomma rufipes (Hartig, 1841)

on Salix

rufous willow-bark aphid

Pterocomma rufipes + Lasius fuliginosus on Salix cinerea

Salix cinerea, Biddinghuizen, Spijk- en Bremerbergbos © Hans Jonkman

Pterocomma rufipes + Lasius fuliginosus on Salix cinerea

ant attendance by Lasius fuliginosus

Pterocomma rufipes

the yellow, swollen siphunculi are conspicuous

gall

aphids on the young branches, intensely attended by ants. Characteristic is that the yellowish siphunculi are not cylindrical but more or less swollen. Alatae have a pattern of darkened transversal bands on the abdomen; the intensity is variable; in the pictures above it is quite strong. There is no host plant alternation. The aphids feed on the young, barely lignified shoots.

hostplants

Salicaceae, monophagous

Salix alba, babylonica, caprea, cinerea, elaeagnos, “x fragilis”, gmelinii, lapponum, mollissima, myrsinifolia, pentandra, phylicifolia, purpurea, triandra, viminalis.

Rarely also Populus balsamifera.

references

Blackman & Eastop (2017), Börner & Franz (1956a), Heie (1986a), Influential Points (2017), Lampel & Meier (2003a), Osiadacz & Wojciechowski (2008a), Petrović (1998a), Tambs-Lyche & Heie (1984a).

mod 27.iii.2018