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


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

UK Map