Food Plant: Cirsium arvense (Creeping Thistle), C. palustre (Marsh Thistle), C. vulgare (Spear Thistle), Senecio jacobaea (Common Ragwort); Elsewhere: Carduus spp, Inula spp.

Mine: unknown but adults seen in May - September (Papp L & Cerný M (2015))

Notes: Is an internal stem borer, pupariating in the stem. The puparium is a pale whitish to straw colour (as shown). The posterior spiracles are separated by approximately their own diameter and have a black central horn. Puparium in Senecio jacobaea (Common Ragwort).

Data: 29.xi.2020 ex mine 28.xi.2020, Downham Market, Norfolk, VC28

Image:© Rob Edmunds

Recording Grade: 4

References:
Papp L & Cerný M (2015), Agromyzidae (Diptera) of Hungary,1, Agromyzinae
Spencer, KA (1972) -Diptera, Agromyzidae; Handbooks for the Identification of British Insects, 10
Spencer K A (1990), Host specialization in the World Agromyzidae (Diptera)