Plant Parasites of Europe

leafminers, galls and fungi

Andricus quercusradicis

Andricus quercusradicis (Fabricius, 1798)

on Quercus, agamous generation

Andricus quercusradicis: agamous generation gall on Quercus robur

Quercus robur, België, Gent, Bourgoyen, Ossemeersen @ Bart Uitterhaege

Andricus quercusradicis: agamous generation gall on Quercus robur

sliced gall, with vacated gall chambers


Irregular tuber, up to 6 cm, attached to a shallow root or the base of 2-5 year old sapling. The gall, initially soft, lignified later, harbours up to several hundred gall chambers, each one with a single larva that matures in October of the second year.

host plants

Fagaceae, monophagous

Quercus canariensis, coccifera, faginea, lusitanica, petraea, pubescens, pyrenaica, robur, suber.

on Quercus, sexual generation

cf Andricus quercusradicis sexual generation gall on Quercus robur

Quercus robur, Belgium, prov. Antwerp, Mol, 17.iii.2013 © Carina Van Steenwinkel: two galls of the sexual generation, possibly of A. quercusradicis.

Andricus trilineatus: gall on Quercus lusitanica

Quercus lusitanica, gal (uit Houard,1908a)


galling of a twig (from Houard, 1908a)


Often only weak, not hairy swelling in the petiole or midrib, with a single gall chamber (seemingly more when several galls coalesce); this type of gall cannot be separated from the one by A. testaceipes unless by breeding. Galls can also consist of more or less marked swellings of a twig; when the bark is removed, 1 mm large gall chambers become apparent, surrounded by a conspicuous light coloured ring. Galls from June till August, mature in July.

host plants

Fagaceae, monophagous

Quercus cerris, coccifera, faginea, frainetto, lusitanica, petraea, pyrenaica, robur, suber.


Andricus radicis Hartig, 1841; A. trilineatus Hartig, 1840; A. beirensis Tavares, 1902.


Ceroptres clavicornis; Saphonecrus connatus; Synergus apicalis, incrassatus, tibialis.


Andersen & Fjellberg (1977a), Béguinot (2006a), Bellmann (2012a), Blanes-Dalmau, Caballero-López & Pujade-Villar (2017a), Buhr (1965a), Burton, Carbonnelle, Ellis & Schneider (2019a), Cerasa (2015a), Cogolludo (1921a), Dauphin & Aniotsbehere (1997a), Eady & Quinlan (1963a), Ecott (2012a), Flügel (2016a), Hellrigl (2009a), Hellrigl & Bodur (2015a), Houard (1908a), Katılmış & Kıyak (2008a), Kemal & Koçak (2010a), Koops (2013a), Kwast (2012a, 2014a), Lambinon, Carbonnelle & Claerebout (2015a), Lambinon, Schneider & Chevin (2003a), Lambinon Schneider & Feitz (2012a), Marković (2014a), Melika (2006a), Melika, Csóka & Pujade-Villar (2000a), Nieves-Aldrey (1983a, 2001a), Nieves-Aldrey, Gómez, Hernández Nieves & Lobo (2006a), Redfern & Shirley (2011a), Roskam (2009a), Tavares (1905a), Tomasi (2003a, 2012a, 2014a), Williams (2010a).

Last modified 26.vii.2020