Andricus corruptrix

The larvae of the cynipid gall wasp Andricus corruptrix cause galls to form in the buds of Oak (Quercus species). 

Small inconspicuous sexual galls are formed in oak buds.

The asexual galls are more often found.  They are also in buds, and are hard and woody, with 1-5 smooth lobes, sometimes with tiny rosettes in the centre of the apex

Several other Andricus species form sexual and asexual galls in the buds of oak

Gall  Adult

Where the host Oak species are present.

All year round.

Status in Britain not known.

Status in Leicestershire and Rutland not known.