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

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.


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).

mod 20.xi.2019