Plagiotrochus razeti Barbotin, 1985

on Quercus, agamous generation

gall

fusiform swellings of the underground or just above-ground runners, 15 x 20 to 15 x 50 mm. In the gall a number of elliptic, 3 mm long, radially arranged gall chambers. Univoltine, pupation and hibernation in the gall.

primary host plants

Fagaceae, narrowly monophagous

Quercus coccifera, ilex.


on Quercus, sexual generation

gall

small (1 x 2 mm), obpyriform galls, usually 2-5 together, alongside a bud. Also a few gall chambers can be formed in the axis of a male inflorescence, that remains shortened and somewhat contorted. The wasps leave the gall within a few weeks.

primary host plants

Fagaceae, narrowly monophagous

Quercus coccifera, ilex.

inquilines

Synergus crassicornis. Galls of the sexual generation, occupied by Synergus turn quite larger and become more or less globular with an apical pustule.

references

Blanes-Dalmau, Caballero-López & Pujade-Villar (2017a), Dauphin & Aniotsbehere (1997a), Melika, Ros-Farré & Pujade-Villar (2001a), Nieves-Aldrey (2001a), Nieves-Aldrey, Gómez, Hernández Nieves & Lobo (2006a), Shachar, Melika, Inbar & Dorchin (2018a).

mod 4.ii.2019