Quercus robur, België, Gent, Bourgoyen, Ossemeersen, 8.xii.2012 @ Bart Uitterhaege

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 hundreds 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

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

Quercus lusitanica, gal (uit Houard,1908a)

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.

parasitoids, predators

Arthrolytus incisus, nanus; Bootanomyia dorsalis; Cecidostiba fungosa, geganius, hilaris; Eupelmus aseculatus, barai, urozonus, vesicularis; Eurytoma brunniventris; Hobbya stenonota; Ormyrus pomaceus; Sycophila flavicollis; Torymus erucarum, nobilis, scutellaris.

references

Andersen & Fjellberg (1977a), Askew (1961b), 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), Doğanlar (2017a), Eady & Quinlan (1963a), Ecott (2012a), Flügel (2016a), Fusu (2017a), Gómez, Hernández Nieves, Garrido Torres, ao (2006a), Gomez & Nieves-Aldrey (2012a), 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 & Askew (1988a), Nieves-Aldrey (1983a, 2001a), Nieves-Aldrey, Gómez, Hernández Nieves & Lobo (2006a), Redfern & Shirley (2011a), Roskam (2009a), Tavares (1905a), Tomasi (2003a, 2012a, 2014a), Williams (2010a).