The larvae of the fly Phytomyza cytisi mine the leaves of Laburnum. The mine is linear with primary feeding lines often distinct. Frass is usually in black thread-like strips.

See the National Agromyzidae Recording Scheme website for further details of puparium, adult insect and host plants.

ref.: Warrington, B.P. (2023).  Phytomyza cytisi. Accessed at https://agromyzidae.co.uk/species/agromyzidae/phytomyzinae/phytomyza/phytomyza-cytisi/ on 13/12/2023)

Leafmine Adult

Leafmine: Please provide a back-lit image of the mine and state the host species.

Hostplant: Laburnum

Click on the 'further details' link in the 'Description' section above.  Then click on the Phenology tab which will provide phenology details for both adult and larval stages.

Leafmine may be found between June and December.

Pupation occurs outside the mine. Puparium brown.

Widespread, but sometimes local in Britain.

Warrington, B. P. 2022. A provisional review of the status of Agromyzidae in Great Britain & Northern Ireland

Occasional in Leicestershire and Rutland.

http://www.leafmines.co.uk/html/Diptera/P.cytisi.htm

https://bladmineerders.nl/parasites/animalia/arthropoda/insecta/diptera/brachycera/agromyzidae/phytomyzinae/phytomyza/phytomyza-cytisi/