Oak Mildew - Erysiphe alphitoides

    Alternative names
    Microsphaera alphitoides

    Erysiphe alphitoides is a fungal rust (a foliar pathogen) that causes a powdery mildew on the leaves of Oak.

    Identification difficulty

    Areas where Oak occurs.

    When to see it

    When Oak is in leaf.

    UK Status

    Widespread and fairly frequent in Britain.

    VC55 Status

    Fairly frequent 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