European Elm Leafcurl Aphid - Eriosoma ulmi
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.
Gall is found on Elm leaves and is especially noticeable on Wych Elm.
Gall on Elm appears from May onwards and can then be found whilst Elm remains in leaf.
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.
Common and widespread but under recorded in Britain.
Fairly frequent in Leicestershire and Rutland.
Leicestershire & Rutland Map
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Yellow squares = NBN records (all known data)
Coloured circles = NatureSpot records: 2020+ | 2015-2019 | pre-2015