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LINARIA. Toadflaxes. [Scrophulariaceae]

Twenty-four species of Linaria are recorded in Britain. These include the native Jersey Toadflax (L. pelisseriana), Pale Toadflax (L. repens) and Common Toadflax (L. vulgaris). Two species, the polyphagous agromyzids Chromatomyia horticola and Liriomyza bryoniae, arerecorded on Linaria in Britain. The agromyzids Liriomyza sativae and Liriomyza trifolii, polyphagous pest species of ornamental and vegetable crops occasionally intercepted at UK points of entry, are recorded on Linaria. Liriomyza trifolii has been found under glass in England Wales. All populations have been and continue to be eradicated. Elsewhere the polyphagous agromyzids Chromatomyia horticola, Liriomyza bryoniae, Liriomyza strigata and Liriomyza trifolii are recorded mining Linaria. One non-dipterous leaf-miner is recorded on Linaria in Britain (see below).

Common Toadflax - Linaria vulgaris

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. Puparium whitish, anterior spiracles projecting through the epidermis. Mine of Chromatomyia horticola on Papaver rhoeas. Image: Willem Ellis (Source: Nederlandse bladmineerders) Chromatomyia horticola (Goureau) [Agromyzidae]   -> A short, irregular, linear upper surface mine on any part of the leaf, indistinguishable from the mine of Liriomyza sativae. Puparium pale yellowish-brown Mines of Liromyza bryoniae on Tomato. Image: Crown copyright - courtesy of CSL Liriomyza bryoniae (Kaltenbach) [Agromyzidae].

Non-dipterous miners recorded on Linaria in Britain Apteropeda orbiculata (Marsham, 1802) Coleoptera: Chrysomelidae

Last updated 10-Sep-2008  Brian Pitkin