Macrodiplosis roboris

    Description

    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
    Habitat

    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

    UK Map