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

gall

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)

Andricus

galling of a twig (from Houard, 1908a)

gall

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.

synonyms

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

inquilines

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

references

Béguinot (2006a), Bellmann (2012a), Blanes-Dalmau, Caballero-López & Pujade-Villar (2017a), Buhr (1965a), 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 22.viii.2019