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ARCTIUM. Burdocks. [Asteraceae]

Four species of Arctium are recorded in Britain. These include the native species Greater Burdock (A. lappa), Lesser Burdock (A. minus) and Wood Burdock (A. nemorosum). Five dipterous miners, the agromyzids Chromatomyia 'atricornis' and Phytomyza lappae, the anthomyiid Pegomya laticornis, and the tephritids Cryptaciura rotundiventris and Trypeta zoe, are recorded on Arctium in Britain, although those of C. rotundiventris require confirmation. The agromyzids Liriomyza huidobrensis and Liriomyza trifolii, polyphagous pest species of ornamental and vegetable crops occasionally intercepted at UK points of entry, are recorded on Arctium. Both species have been found under glass in England and Wales. All populations have been and continue to be eradicated. The agromyzid Melanagromyza lappae is recorded boring the stems of Arctium in Britain and elsewhere. Elsewhere the agromyzids Chromatomyia 'atricornis', Chromatomyia syngenesiae, Liriomyza huidobrensis, Liriomyza strigata, Liriomyza trifolii, Phytomyza continua and Phytomyza lappae, the anthomyiid Pegomya laticornis, and the tephritids Acidia cognata, Euleia heraclei and Trypeta zoe are recorded mining Arctium. Two non-dipterous miners are recorded on Arctium in Britain (see below). Elsewhere one additional British non-dipterous miner is recorded on Arctium (see below).

Lesser burdock - Arctium minus

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

#> Details of mine unknown. Pupation external. Puparium yellow Cryptaciura rotundiventris (Fallén) [Tephritidae]. 1> Blotch mine restricted by leaf veins; frass in irregular lumps. Mine of Pegomya laticornis on Arctium sp. Image: Willem Ellis (Source: Nederlandse bladmineerders) Pegomya laticornis (Fallén) [Anthomyiidae]. -> Linear, corridor mine. 2. 2> 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]. -> An unusually long, narrow, whitish linear mine, frequently following a vein. Numerous larvae can occur together in a single leaf which can be completely eaten out. Pupation external. Puparium black Mines of Phytomyza lappae on Arctium sp. Image: Willem Ellis (Source: Ellis,Nederlandse bladmineerders) Phytomyza lappae Goureau [Agromyzidae].

Non-dipterous miners recorded on Arctium in Britain Coleophora paripennella Zeller, 1839 Lepidoptera: Coleophoridae Coleophora peribenanderi Toll, 1943 Lepidoptera: Coleophoridae Additional British non-dipterous miners recorded on Arctium elsewhere Agonopterix propinquella (Treitschke, 1835) Lepidoptera: Depressariidae

Last updated 19-Aug-2008  Brian Pitkin

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