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IVA. Marsh-elder. [Asteraceae]

Three species of Iva are recorded in Britain. All, including Marsh-elder (I. xanthiifolia), are introduced. Two dipterous miners, the agromyzids Chromatomyia 'atricornis' and Liriomyza strigata are recorded on Iva in Britain, although the former requires confirmation. Elsewhere the polyphagous agromyzids Chromatomyia 'atricornis' and Liriomyza strigata are recorded mining Iva. No non-dipterous miners are recorded on Iva in Britain.

Key for the identification of the known Diptera mines in Britain.

1> Mine linear, whitish, both upper and lower surface. Pupation internal, at the end of the mine, with the anterior spiracles projecting through the epidermis. Mine of Chromatomyia atricornis on Sonchus olearaceus. Images: Willem Ellis (Source: Nederlandse bladmineerders) Chromatomyia 'atricornis' auctt. [Agromyzidae]. -> A distinctive mine primarily above mid-rib, with irregular short lateral offshoots into leaf blade. Pupation external.     Mines of Liriomyza strigata on Sonchus. Image: Crown copyright - courtesy of CSL Liriomyza strigata (Meigen) [Agromyzidae]

Last updated 10-Sep-2008  Brian Pitkin

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