Andricus foecundatrix (Hartig, 1840)

on Quercus robur etc., agamous generation

Quercus robur, Hungary, Budapest, 5.vii.2015 © László Érsek

detail

opened gall, the inner gall is visible

opened inner gall

detail of the inner gall

Quercus robur, Belgium, prov. Luxembourg, Arlon, 28.viii.2007 © Jean-Yves Baugnée

Quercus robur, RBB Dronten, Roggebotbos, 20.viii.2017 © Hans Jonkman: the hard- and thick-walled inner gall is pushed out at maturity

Quercus robur, Tilburg, de Kaaistoep, 23.viii.2006: lateral scales of the gall

scales of the tip of the gall

inner gall

opened inner gall

Quercus robur, Enterm 28.iv.2011 © Arnold Grosscurt. This picture, taken in late April, shows that the inner gall, with living larva, may remain within the gall till well after the winter.

Quercus robur, Belgium, prov. Hainaut, Comines, 22.ix.2019 © Martin Windels: old gall

gall

Up to a cm large globular bud gall consisting of enlarged and over-numerous bud scales. In the central gall cavity an inner gall with a smooth, brown, woody wall. Galls from June.

host plants

Fagaceae, monophagous

Quercus faginea, frainetto, x hispanica, infectoria, lusitanica, petraea, pubescens, pyrenaica, robur.

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on Quercus robur etc., sexual generation

Quercus robur catkin with galls and individual gall (from Houard, 1908a)

Quercus robur, Germany, Saarland, Bexbach, iv. 2018 © Volker Fäßler

This picture shows that not the entire stamen but only one pair of loculi has been galled.

Quercus robur, Dronten, 21.iv.2010 © Arnold Grosscurt

detail

gall

Unilocular catkin gall. The gall is ovoid, 2-3 mm long, with long, erect white, hairs < diameter of the gall; they are situated amidst normal stamina. Tip of the gall often dark brown. The gall is vacated in May-June.

host plants

Fagaceae, monophagous

Quercus faginea, frainetto, infectoria & subsp. veneris, lusitanica, petraea, pubescens, pyrenaica, robur.

synonyms

Andricus fecundator (Hartig, 1840); A. pilosus Adler, 1881.

inquilines

Arnoldiola gemmae; Synergus crassicornis, gallaepomiformis.

parasitoids, predators

Aulogymnus trilineatus; Eupelmus azureus, urozonus; Mesopolobus xanthocerus; Ormyrus pomaceus.

references

Abras, Fassotte, Chandelier & Cavelier (2008a), Andersen & Fjellberg (1977a), Askew (1961b), Béguinot (2001c, 2002a,e,g,h, 2003a, 2006a,c, 2007b, 2012a), Bellmann (2012a), Blanes-Dalmau, Caballero-López & Pujade-Villar (2017a), Buhr (1965a), Burton, Ellis & Schneider (2022a), Cerasa (2015a), Chinery (2011a), Cogolludo (1921a), Coulianos & Holmåsen (1991a), Dauphin &a Aniotsbehere (1997a), Deckert & Deckert (2016a), Eady & Quinlan (1963a), Groom (2011a), Hellrigl (2009a, 2010a), Hellrigl & Bodur (2015a), Houard (1908a), Ilie & Marinescu (2011a), Karaca & Katılmış (2020a), Katılmış & Kıyak (2008a), Kemal & Koçak (2010a), Kollár (2011a), Koops (2013a), Kwast (2012a, 2014a), Lambinon, Carbonnelle & Claerebout (2015a), Lambinon & Romain (2009a), Lambinon, Schneider & Chevin (2003a) Lehmann & Hannover (2016a), Melika (2006a), Melika, Csóka & Pujade-Villar (2000a), Mete & Demirsoy (2012a), Nieves-Aldrey (1983a, 1984b, 2001a), Nieves-Aldrey, Gómez, Hernández Nieves & Lobo (2006a), Pellizzari (2010b), Redfern & Shirley (2011a), Roskam (2009a), Schimitschek (1939a), Shachar, Melika, Inbar & Dorchin (2018a), Skuhravá, Skuhravý & Jørgensen (2006a), Tavares (1905a), Tomasi (2003a, 2012a, 2014a), Wiebes-Rijks (1976a), Williams (2010a).