Food Plant: Bolboschoenus maritimus (Sea Club-rush), Carex paniculata (Greater Tussock-sedge), Carex pendula (Pendulous Sedge), Carex sylvatica (Wood-sedge), Scirpus sp (Club-rush)

Mine:June-August (bivoltine) (October also in some years)

Notes: May mine upper or lower surface and may change direction. The photo shows two lower surface mines on Bolboschoenus maritimus (Sea Club-rush). Leaves may contain two mines (as shown). Frass is dispersed in one large lump. Pupariation occurs within the mine. The puparium is yellow to reddish-brown. The larva and mines are identical to C.morosa. This is the first record of these mines on Bolboschoenus maritimus (Sea Club-rush).

Data: 10.vii.2018, Hessle, South-east Yorkshire, VC61

Image:© Barry Warrington

Recording Grade: 5

References:
Hering, M (1957) - Bestimmungstabellen der Blattminen von Europa.
Robbins, J (1990) - A Provisional Atlas of The Leaf Miners of Warwickshire.
Spencer, K A (1976) - The Agromyzidae of Fennoscandia and Denmark.
Spencer, K.A (1972) - "Diptera: Agromyzidae" Handbooks for the Identification of British Insects, Royal Entomological Society of London
Warrington, B.P (2018), Leaf-mining flies (Agromyzidae) new to the Yorkshire Diptera list. The Naturalist, April 2018. Vol 143, No.1097
Warrington, B.P (2018) Sea club-rush (Bolboschoenus maritimus) confirmed as a host-plant of Cerodontha (Dizygomyza) suturalis (Hendel) (Diptera, Agromyzidae), Dipterists Digest 25, 75-78