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ONOPORDUM. Cotton thistle. [Asteraceae]

Five species of Onopordum are recorded in Britain. These include the native Cotton thistle (O. acanthinum). One dipterous miner, the agromyzid Phytomyza spinacaeae, is recorded on Onopordum in Britain. Elsewhere the agromyzids Chromatomyia 'atricornis', Liriomyza strigata, Phytomyza autumnalis and Phytomyza spinaciae are recorded mining Onopordum. No non-dipterous miners are recorded on Onopordum in Britain. Elsewhere one British non-dipterous miner is recorded on Onopordum.

Cotton Thistle - Onopordum acanthium

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

1> Long narrow interparenchymal mine, greenish. Pupation in leaf at end of mine Phytomyza spinaciae Hendel [Agromyzidae]

British non-dipterous miners recorded on Onopordum elsewhere Scrobipalpa acuminatella Lepidoptera: Coleophoridae

Last updated 11-Sep-2008  Brian Pitkin

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