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PISUM. Pea. [Fabaceae]

Two species of Pisum are recorded in Britain. These include the introduced Garden Pea (P. sativum). Six dipterous 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-dipterous miners are recorded on Pisum in Britain.

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

#> Details of mine unknown. Scaptomyza sp. [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 Ophiomyia orbiculata (Hendel) [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 Agromyza lathyri Hendel [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 (Source: Nederlandse bladmineerders) Chromatomyia horticola (Goureau) [Agromyzidae]. ->An upper surface linear mine with frass in conspicuous greenish strips, largely alternating at each side of the channel. Puparium yellow Vicia sepium Lathyrus pratensis Mines of Liriomyza congesta. Images: Willem Ellis (Source: Nederlandse bladmineerders) Liriomyza congesta (Becker) [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 (Source: Nederlandse bladmineerders) Liriomyza pisivora Hering [Agromyzidae].

Last updated 30-Jul-2008  Brian Pitkin

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