Eriophyes pyri

    Description

    Eriophyes pyri is a tiny mite that causes galls to form on the leaves of Rowan and other members of the rose family, including cultivated pear trees. The gall is seen more often than the mite which causes domed pustules with openings, on both leaf surfaces - green/yellow at first but turning brown.

    Similar Species

    Phyllocoptes sorbeus is also found on Rowan, and is similar, but has a dense whitish, pinkish or yellowish felt-like erineum on the under- or upper-side of the leaf.

    Identification difficulty
    ID guidance

    Good photos of both under- and upper-side of leaf are needed, showing presence of pustules with openings.  The host plant should be noted in the Comments 

    Habitat

    On the leaves of Rowan and pear trees.

    When to see it

    Galls are visible from late spring or summer until autumn.

    Life History

    The mites escape from the gall through pores on either side of the leaf to pass the winter in bark crevices.

    UK Status

    Widespread and common in Britain.

    VC55 Status

    Common in Leicestershire and Rutland.

    be our species champion

    Leicestershire & Rutland Map

    MAP KEY:

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

    UK Map