HOME : Introduction : Methods : Miners : Parasitoids Host plants by Scientific name : Common name References : Web resources : Acknowledgements : Recent changes : Index : Search

DAHLIA. Dahlias. [Asteraceae]

Dahlia (Dahlia pinnata) and Garden Dahlia (D. x cultorum) are cultivated in gardens in Britain. Three dipterous miners, the agromyzids Chromatomyia horticola, Liriomyza bryoniae and Liriomyza strigata are recorded on Dahlia in Britain. The agromyzids Liriomyza huidobrensis, Liriomyza sativae and Liriomyza trifolii, polyphagous pest species of ornamental and vegetable crops occasionally intercepted at UK points of entry, are recorded on Dahlia. Liriomyza huidobrensis and Liriomyza trifolii have been found under glass in England and Wales. All populations have been and continue to be eradicated. Elsewhere the polyphagous agromyzids Chromatomyia horticola, Chromatomyia syngenesiae, Liriomyza bryoniae Liriomyza huidobrensis, Liriomyza sativae, Liriomyza strigata and Liriomyza trifolii are recorded mining Dahlia. No non-dipterous miners are recorded on Dahlia in Britain.

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

1> 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]. -> Mine not primarily above mid-rib. 2. 2> 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].

Last updated 10-Sep-2008  Brian Pitkin

.