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CALENDULA. Marigolds [Asteraceae]

Two species of Calendula are recorded in Britain - Field Marigold (C. arvensis) and Perennial Pot Marigold (C. officinalis). Both species are introduced. The polyphagous agromyzid Liriomyza strigata is the only dipterous miner recorded on Calendula 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 Calendula. Liriomyza huidobrensis and Liriomyza trifolii have been found under glass in England and Wales. All populations have been and continue to be eradicated. The agromyzid Napomyza lateralis feeds in the stems of Anthemis, Bidens, Calendula, Dimorphotheca, Matricaria, and Senecio in Britain, although it has also been found in the inflorescence of Matricaria (Spencer, 1972). Elsewhere the agromyzids Liriomyza huidobrensis, Liriomyza sativae, Liriomyza strigata and Liriomyza trifolii are recorded mining Calendula. No non-dipterous miners are recorded on Calendula 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].

Last updated 21-Feb-2008  Brian Pitkin

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