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TRAGOPOGON. Goat's-beard and Salsifies. [Asteraceae]

Four species of Tragopogon are recorded in Britain. These include the native Goat's-beard (T. pratensis) and the introduced Slender Salsify (T. hybridus) and Salsify (T. porrifolius). Two dipterous miners, the agromyzids Liriomyza pusio and Liriomyza tragopogonis, is recorded on Tragopogon in Britain. The agromyzid Liriomyza trifolii, a pest species of ornamental and vegetable crops occasionally intercepted at UK points of entry, is recorded on Tragopogon. The species has been found under glass in England and Wales. All populations have been and continue to be eradicated. Elsewhere the agromyzids Chromatomyia 'atricornis', Liriomyza strigata, Liriomyza trifolii and Ophiomyia heringi are recorded mining Tragopogon. No non-dipterous miners are recorded on Tragopogon in Britain.

Goat's-beard - Tragopogon pratensis

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

1> An irregular whitish linear-blotch mine above the mid-rib. Puparium orange Liriomyza tragopogonis (Meijere) [Agromyzidae]. -> Upper-surface, unusually short corridor (ca. 4 cm). Sometimes several mines in a leaf. Pupation outside the mine Liriomyza pusio (Meigen) [Agromyzidae]

Last updated 11-Sep-2008  Brian Pitkin

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