Plagiotrochus australis (Mayr, 1882)

on Quercus, agamous generation

gall

This generation makes unilocular galls with a diameter of c. 1×4 mm under the bark of branches that are five to seven years old. They are “easiest” found by their exit holes.

host plants

Fagaceae, monophagous

Quercus coccifera, ilex.

on Quercus, sexual generation

Plagiotrochus australis FM: gall on Quercus ilex

Quercus ilex, Spanje, Asturias, Gijon: young gall; © Jean-Yves Baugnée

old gall, upperside

underside

opened gall

galls

Full grown, fresh galls are red and downy.

host plants

Fagaceae, monophagous

Quercus coccifera, ilex, rotundifolia, suber.

synonyms

Dryocosmus australis.

inquilines

Ceroptres cerri; Synergus ilicinus, plagiotrochi.

references

Béguinot (2003a), Blanes-Dalmau, Caballero-López & Pujade-Villar (2017a), Bowdrey & Notton (2019a), Cogolludo (1921a), Dauphin & Aniotsbehere (1997a), Hellrigl (2009a), Hellrigl & Bodur (2015a), Houard (1908a), Nieves-Aldrey (1981a, 2001a), Nieves-Aldrey, Gómez, Hernández Nieves & Lobo (2006a), Pujade, Villemant & Andreï-Ruiz (2000a), Pujade-Villar (2005b), Redfern & Shirley (20011a), Salas-Remón, Llimona, Lozano ao (2015a), Tavares (1905a), Tomasi (2014a).