Macrodiplosis roboris


Larvae of the gall midge Macrodiplosis roboris cause the leaves of Oak (Fagaceae) to roll upwards forming a gall. The rolls usually occur between the lobes of the leaf.

Identification difficulty

Adult Gall


Areas where Oak is present.

When to see it

Fresh galls can be encountered from June until late September when the rolls turn brown and the larvae escape.

Life History

Larvae white at first, ± orange later; one generation per year; the larvae hibernate in the soil.

UK Status

Probably fairly frequent in Britain, but status is difficult to determine due to lack of records.

VC55 Status

Status in Leicestershire and Rutland not known.

Leicestershire & Rutland Map


Yellow squares = NBN records (all known data)
Coloured circles = NatureSpot records: 2020+ | 2015-2019 | pre-2015

UK Map