Plant Parasites of Europe

leafminers, galls and fungi

Phylloxera quercus

Phylloxera quercus Boyer de Fonscolombe, 1834

on evergreen oaks

primary host plants

Fagaceae, narrowly monophagous

Quercus ilex.

on deciduous oaks


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.

secondary host plants

Fagaceae, narrowly monophagous

Quercus cerris, coccifera, frainetto, petraea, pubescens, robur.


south-european species; records of Ph. quercus from more northern Europe most probably are erroneous.


Barbagallo, Binazzi, Pennacchio & Pollini (2011a), Barbagallo & Massimino Cocuzza (2014a), Barson & Carter (1972a), Blackman & Eastop (2014), Braggion (2013a), Buhr (1965a), Houard (1908a), Meliá Masiá (1986a), Redfern & Shirley (2011a), Roques, Cleary, Matsiakh & Eschem (2017a).

Last modified 4.iv.2019