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CHRYSANTHEMUM. Crown Daisy and Corn Marigold [Asteraceae]

Two species of Chrysanthemum are recorded in Britain the introduced Crown Daisy (C. coronarium) and Corn Marigold (C. segetum). Six dipterous miners, the agromyzids Chromatomyia 'atricornis', Chromatomyia syngenesiae, Liriomyza strigata and Liriomyza tanaceti and the tephritids Trypeta artemisiae and Trypeta zoe are recorded on Chrysanthemum in Britain. Some of the records on Chrysanthemum may refer to C. vulgare, which is now Tanacetum vulgare. 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 Chrysanthemum. 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 agromyzid Chromatomyia horticola and Chromatomyia syngenesiae, Liriomyza huidobrensis, Liriomyza sativae, Liriomyza strigata and Liriomyza trifolii, and the tephritids Trypeta artemisiae and Trypeta zoe are recorded mining Chrysanthemum. Two non-dipterous miners are recorded on Chrysanthemum in Britain (see below). Elsewhere one additional British non-dipterous miner is recorded on Chrysanthemum (see below).

Corn Marigold - Chrysanthemum segetum

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

1> Blotch mine. Pupation external. Puparium yellow Mine of Trypeta artemisiae on Artemisia vulgaris. Image: Willem Ellis (Source: Nederlandse bladmineerders) Trypeta artemisiae (Fabricius) [Tephritidae]. -> Linear mine. 2. 2> Mine not primarily associated with the mid-rib. A narrow linear mine, with frass in black strips. Puparium yellowish. Mine of Liriomyza tanaceti on Tanacetum vulgare. Image: Willem Ellis (Source: Nederlandse bladmineerders) Liriomyza tanaceti Meijere [Agromyzidae]. -> Mine primarily associated with the mid-rib. 3. 3> 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]. -> 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]. -> A broad linear mine following the mid-rib, with irregular lateral offshoots. Puparium yellow Mine of Trypeta zoe on Artemisia vulgaris. Image: Willem Ellis (Source: Nederlandse bladmineerders) Trypeta zoe Meigen [Tephritidae].

Non-dipterous miners recorded on Chrysanthemum in Britain Cnephasia conspersana Douglas, 1846 Lepidoptera: Tortricidae     Cnephasia incertana (Treitschke, 1835) Lepidoptera: Tortricidae   Non-dipterous miners recorded on Chrysanthemum in Britain Mompha langiella (Hübner, 1796) Lepidoptera: Momphidae

Last updated 30-Jul-2008  Brian Pitkin

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