Phylloxera coccinea (von Heyden, 1837)

on Quercus

Quercus spec., France, Val-d’Oise, Saint-Leu-la-Forêt, 1.vi.2020 © Pierre Duhem

underside of the same leaf, with aphids (identification at specific level uncertain!)

detail

gall

tiny (< 1 mm) orange-yellow aphids on the underside of a leaf; each causes a yellow necrotic spot at underside and upperside. Some animals deposit large numbers of shining yellow eggs in a double concentric circle.

host plants

Fagaceae, narrowly oligophagous

Quercus aliena, ilex, lusitanica, petraea, pubescens, pyrenaica, robur.

notes

the aphids differ from Ph. glabra on the same host plant by having a conspicuous latero-dorsal row of tubercles.

references

Béguinot (2002f, 2003a, 2007b, 2012a), Börner (1957a, Blackman & Eastop (2014), Börner & Franz (1956a), Buhr (1965a), Coulianos & Holmåsen (1991a), Dauphin & Aniotsbehere (1997a), Hellrigl (2004a), Houard (1908a), Kollár (2007a), Lampel & Meier (2003a), Lubiarz (0000a), Osiadacz & Wojciechowski (2008a), Roskam (2009a), Sylvén (1960a), Tavares (1905a), Tomasi (2014a), Wojciechowski, Depa, Halgoš ao (2016a).