The larvae mine the leaves of Broom and related plants.  The mine is hook-like, usually along the leaf-margin and running towards the leaf apex, then turning and widening into a blotch over the mid-rib.  

See the National Agromyzidae Recording Scheme website for a full list of host plants and further details

Agromyza pulla, on Genista and Spartium

(ref.: Warrington, B.P. (2023).  Agromyza johannae. Accessed at https://agromyzidae.co.uk/species/agromyzidae/agromyzinae/agromyza/agromyza-johannae/  on 11/12/2023)

Leaf-mine Adult

Leaf-mine: Please provide close-up photographs of the mine, including a back-lit image to show the frass.  Please also state the host plant.

Where the larval host plants occur.

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.

Nationally Scarce B.

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

Rarely recorded in Leicestershire and Rutland.

http://www.leafmines.co.uk/html/Diptera/A.johannae.htm

https://bladmineerders.nl/parasites/animalia/arthropoda/insecta/diptera/brachycera/agromyzidae/agromyzinae/agromyza/agromyza-johannae/