Artichoke Gall Wasp - Andricus foecundatrix

    Alternative names
    Andricus fecundator

    Andricus foecundatrix is a parthenogenetic Gall Wasp, it has a life cycle with encompasses a sexual generation as well as an agamic (all female with no need to mate) generation and these cause different galls in different locations English Oak and Sessile Oak. The first generation is able to reproduce without male fertilisation of the eggs. The female lays single eggs within leaf buds of Oak using her ovipositor causing an Artichoke shaped gall to form.The gall is more likely to be seen than the adult wasp.

    Identification difficulty

    Adult Gall


    Anywhere that the host trees grow.

    Life History

    This Cynipid Gall Wasp has two sexual generations. The Artichoke Gall is caused by the agamic generation. It is common and found on the terminal and axillery buds of Oak trees from June to September. It has an alternate sexual generation on Oak catkins.

    UK Status

    Common and widespread in much of Britain where the host trees are present.

    VC55 Status

    Common in Leicestershire and Rutland.

    Further Information

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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