The larva of the Agromyzid fly Phytomyza heracleana mines the leaves of Hogweed and form a blotch mine between two veins. The mine often has a sieve-like appearance (where the larva has fed through the upper parenchyma).

See the National Agromyzidae Recording Scheme webpage for this species for further details of puparium and adult insect.

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

Leafmine Adult

Leafmine: Please include a back-lit image showing frass patterns and also state the host plant.

Hostplant: Hogweed

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.

Leafmines from May to September. Adult: May – August.

Pupation outside the mine.

Quite widespread but local in Britain.

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

Rarely recorded in Leicestershire and Rutland.