Chromatomyia horticola


    The larvae of the fly Chromatomyia horticola mine the leaves of various plants including Purple Toadflax creating an upper-surface, less often lower-surface corridor. Frass in isolated grains. Pupation within the mine, in a, usually lower-surface, puparial chamber.

    Identification difficulty

    Adult Leafmine - leafmine can only be identified to species when on certain plants. 

    Recording advice

    Please include photographs with your record.  For leafmines the images should include a backlit image to show any frass patterns. Please also state the host plant for leafmines.


    Various habitats and mining a wide range of plants.

    When to see it

    Mines can be seen whenever the host plants are in leaf.

    UK Status

    Widespread in Britain. Difficulties of identification make true status hard to determine.

    VC55 Status

    Status in Leicestershire and Rutland not known.

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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