Aceria nalepai

    Alternative names
    Eriophyes inangulis

    A gall mite which causes pouch galls to form on the leaves of Alder, in the angles between the midrib and the primary veins. They appear either alternately or in pairs and may run from the petiole to within two or three veins of the leaf apex. The galls are filled with russet hairs amongst which the mites live, and these hairs often project through to the underside of the leaf to form more or less triangular patches.

    Identification difficulty

    Adult Gall


    Wherever Alder is found.

    When to see it

    Development begins in May and maturity is reached in August or September.

    UK Status

    Widespread, but under recorded in Britain.

    VC55 Status

    Status in Leicestershire and Rutland not known.

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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