Erysiphe euonymi

    Description

    The powdery mildew Erysiphe euonymi  can sometimes be observed as a white dusting on the leaves of Spindle and other Euonymus species.  On close examination the powdery (anamorph) stage may also have little black dots which contain the ascospores (Sexual stage ) - this is known as the holomorph state.

    Identification difficulty
    Recording advice

    Unless identified by a recognised expert, a photo is required and the specimen should be examined with a microscope. In the comments box, state the key or ID method used and describe the size and identifying characters.

    Habitat

    Where Spindle and other Euonymus species are present.

    When to see it

    When the host species are in leaf, particularly in late summer and the start of autumn.

    UK Status

    Mainly found in the south of England and Wales.

    VC55 Status

    Rare or under recorded 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