Walnut Leaf Gall Mite - Aceria erinea

    Description

    Aceria erinea is a mite that causes galls to form on the leaves of Walnut. Large yellowish blisters appear on the upper surface of the leaves with corresponding hollows on the underside which are lined with whitish or pale brown hairs among which the mites live and feed.

    Identification difficulty
    Habitat

    On Walnut.

    When to see it

    Whilst Walnut is in leaf.

    Life History

    The mites spend the winter in the buds.

    UK Status

    Can be fairly frequent where the host trees occur.

    VC55 Status

    Occasional in Leicestershire and Rutland.

    Leicestershire & Rutland Map

    UK Map