Hawthorn-carrot Aphid agg. - Dysaphis crataegi agg.

    Description

    The aphid Dysaphis crataegi causes galls to form on the leaves of Hawthorn (Crataegus sp.) in spring. The gall takes the form of a crimson or purplish red upward bulge (not affecting the whole leaf) ? this bulge contains the aphids. The aphids migrate to umbellifers (Apiaceae) in summer. There are several species in this group that require detailed examination by an expert and we have therefore decided to include these as Dysaphis crataegi aggregate.

    Identification difficulty

    Adult Gall

    Habitat

    Wherever the host plants are present.

    When to see it

    Aphids are usually present on Hawthorn in April and May before migrating to umbellifers. The Hawthorn galls persist whilst the plant is in leaf.

    UK Status

    It is difficult to determine the exact status in Britain due to lack of records.

    VC55 Status

    Status in Leicestershire and Rutland not known.

    Leicestershire & Rutland Map

    MAP KEY:

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

    UK Map