Phylloxera glabra (von Heyden, 1837)

Hemiptera, Phylloxeridae

on Quercus

Phylloxera glabra on Quercus robur

Quercus robur, Hungary, Budapest © László Érsek: leaf with ear galls

Phylloxera glabra on Quercus robur

detail

Phylloxera glabra on Quercus robur

underside of an ear gall

Phylloxera glabra on Quercus robur

a moth later (end May)

Phylloxera glabra on Quercus robur

the leaf clearly becomes mottled

Phylloxera glabra on Quercus robur

two females with eggs

Phylloxera glabra on Quercus robur

an aphid with eggs and nymphs

gall

tiny (< 1 mm) orange-yellow aphids on the underside of a leaf. The aphids of the early spring generation cause “ear galls”. Later generations do not cause any galling, but their suction activities create numerous small yellow spots.The females deposit large numbers of shining yellow eggs in a concentric circle.

hostplants

Fagaceae, narrowly oligophagous

Quercus robur.

Rarely also other deciduous oaks.

notes

for the difference with Ph. coccinea check there.

references

Barson & Carter (1972a), Blackman & Eastop (2014), Börner (1957a), Coulianos & Holmåsen (1991a), Hellrigl (2004a), Lambinon & Schneider (2004a), Redfern & Shirley (2011a) , Roskam (2009a).

28/05/2016

pub 28.v.2016 · mod 18.vii.2017