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

ERIGERON. Fleabanes. [Asteraceae]

Eleven species of Erigeron are recorded in Britain, These include the native Blue Fleabane (E. acer) and Alpine Fleabane (E. borealis). Blue Fleabane (E. acer) is protected in Northern Ireland under Schedule 8 of the Wildlife (Northern Ireland) Order, 1985. Three dipterous miners, the agromyzids Calycomyza humeralis, Chromatomyia 'atricornis' and Phytomyza erigerophila are recorded on Erigeron in Britain. The agromyzid Liriomyza trifolii, a pest species of ornamental and vegetable crops occasionally intercepted at UK points of entry, is recorded on Erigeron. The species has been found under glass in England and Wales. All populations have been and continue to be eradicated. Elsewhere the agromyzids Calycomyza humeralis, Ophiomyia maura, Liriomyza strigata, Liriomyza trifolii and Phytomyza erigerophila, and the anthomyiid Pegomya depressiventris are recorded mining Erigeron. No non-dipterous miners are recorded on Erigeron in Britain.

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

#> Details of mine unknown. Pegomya depressiventris (Zetterstedt) [Anthomyiidae]. 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]. -> short linear mine in first instar, later producing a circular or oval blotch. Frass is excreted in a black mass prior to pupation. Puparium reddish-brown to black, firmly glued with frass within the mine. Mine of Calycomyza humeralis on Aster tripolium. Image: Willem Ellis (Source: Nederlandse bladmineerders) Calycomyza humeralis (von Roser) [Agromyzidae]. -> A narrow upper surface linear mine. Pupation external. Puparium black Phytomyza erigerophila Hering [Agromyzidae].

Last updated 29-Jul-2008  Brian Pitkin

.