European Elm Leafcurl Aphid - Eriosoma ulmi

    Alternative names
    Elm-currant Aphid

    Eriosoma ulmi is a greyish waxy aphid that causes a leaf roll gall to form on the leaves of Elm. One half of the Elm leaf blade crinkles and rolls in to form a tubular pouch. The gall is seen more often than the aphid.

    Identification difficulty

    Adult Gall


    Gall is found on Elm leaves and is especially noticeable on Wych Elm.

    When to see it

    Gall on Elm appears from May onwards and can then be found whilst Elm remains in leaf.

    Life History

    Numerous waxy aphids develop in the pouch galls in spring and early summer. Winged aphids (all females) leave the pouch in June and July and fly to currant bushes where they live and reproduce on the roots, returning to the Elm in autumn.

    UK Status

    Common and widespread but under recorded 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