Dasineura fraxini

    Description

    Dasineura fraxini is a small gall midge that causes a gall to form on the underside of the main vein of Ash leaves. The area becomes swollen to form one or more pouches with a slit-like opening on the upperside, 5 to 30 mm long.

    Identification difficulty

    Adult Gall

    Habitat

    Found on Ash. The gall is seen more often than the insect itself.

    When to see it

    Gall is found from late May to October.

    Life History

    One small orange larva may be found in each pouch.  Pouches may coalesce.

    UK Status

    Fairly common and widespread in England at least.

    VC55 Status

    Fairly common in Leicestershire and Rutland.

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    Leicestershire & Rutland Map

    MAP KEY:

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

    UK Map