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PISUM. Pea. [Fabaceae]

Two species of Pisum are recorded in Britain. These include the introduced Garden Pea (P. sativum). Six Diptera miners, the agromyzids Agromyza lathyri, Chromatomyia horticola, Liriomyza congesta, Liriomyza pisivora and Ophiomyia orbiculata and the drosophilid Scaptomyza sp. are recorded on Pisum in Britain. The agromyzidsLiriomyza huidobrensis, Liriomyza sativae and Liriomyza trifolii, pest species of ornamental and vegetable crops occasionally intercepted at UK points of entry, are recorded on Pisum. 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 agromyzids Agromyza lathyri, Liriomyza bryoniae, Liriomyza congesta, Liriomyza huidobrensis, Liriomyza sativae, Liriomyza strigata, Liriomyza trifolii and Ophiomyia orbiculata; and the drosophilid Scaptomyza flava are recorded mining Pisum. No non-Diptera miners are recorded on Pisum in Britain.

Key for the identification of the known Diptera mines on Pisum in Great Britain and Ireland

#> Details of mine unknown. Scaptomyza montana of Basden (1954) was misidentified. The true montana (Basden, 1949) (described from North America) was synonymised with flava (Fallén, 1823c) by Hackman (1959), who stated that Basden's montana was an undescribed species. It remains undescribed. (Bachli, pers. comm. in Chandler, 1998: 156). Scaptomyza sp. [Diptera: Drosophilidae]. 1> Stem mine. An external stem mine. Pupation in the stem, near or even below ground level, with the anterior spiracles projecting through the epidermis. Puparium reddish-brown On Lathyrus, Pisum and Vicia in Britain and Lathyrus and Pisum elsewhere. Widespread in the south of Britain. Widespread in much of Europe. Ophiomyia orbiculata (Hendel) [Diptera: Agromyzidae]. -> Leaf mine. 2. 2> Initially a lower-surface linear mine, which later develops into large whitish blotch which appears like a pale mottled area from above, due to variable depth of feeding through to upper surface. Less frequently feeding in upper surface or stem. Puparium reddish Part of mine of Agromyza lathyri on Pisum sativum Image: Willem Ellis (Bladmineerders van Europa) On Lathyrus grandiflorus, Lathyrus latifolius, Lathyrus rotundifolius, Lathyrus tuberosus and Pisum sativum in Britain and additional species and genera of Fabaceae elsewhere. Widespread in southern England - Kent, Surrey, Warwick and Cambridge and widespread in Europe. Agromyza lathyri Hendel [Diptera: Agromyzidae]. -> Mine linear, whitish, both upper and lower surface. Pupation internal, at the end of the mine, with the anterior spiracles projecting through the epidermis. Puparium whitish Mine of Chromatomyia horticola on Papaver rhoeas Image: Willem Ellis (Bladmineerders van Europa) Recorded on over 40 plant genera in 17 families in Britain and more elewhere. Widespread in southern England. Also the Republic of Ireland, Europe, Africa, India, China and Japan. Chromatomyia horticola (Goureau) [Diptera: Agromyzidae]. -> An upper surface linear mine with frass in conspicuous greenish strips, largely alternating at each side of the channel. Puparium yellow Vicia sepium and Lathyrus pratensis Mines of Liriomyza congesta Images: Willem Ellis (Bladmineerders van Europa) On numerous genera of Fabaceae in Britain and elsewhere. Widespread in Britain. Also recorded in the Republic of Ireland and widespread and common throughout most of Europe Liriomyza congesta (Becker) [Diptera: Agromyzidae]. -> A long linear mine, normally starting on lower surface, frass in black strips alternately at sides of mine. Mine of Liriomyza pisivora on Lathyrus sylvestris Image: Willem Ellis (Bladmineerders van Europa) On Lathryus, Pisum and Vicia in Britain and Lathryus and Pisum elsewhere. Only known from Kent, Surrey, Herts and Warwick in Britain. Widespread in Europe. Liriomyza pisivora Hering [Diptera: Agromyzidae].

Last updated 10-Aug-2010  Brian Pitkin

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