The larvae of the fly Liriomyza eupatorii mine the leaves of various plants, including Hemp-agrimony (Eupatorium cannabinum). The mine usually starts with a spiral (that quickly turns brown) and then extends into a fairly straight corridor of similar width throughout its length. The frass occurs in long strings.

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

Liriomyza cannabis

ref.: Warrington, B.P. (2023).  Liriomyza eupatorii. Accessed at https://agromyzidae.co.uk/species/agromyzidae/phytomyzinae/liriomyza/li… on 13/12/2023)

Leafmine   Adult

Leafmine: Please provide a back-lit image of the leafmine and state the host plant.

Host plants: Aster, Eupatorium, Galeopsis, Helianthus, Lapsana, Solidago

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 may be found between May and November.

Widespread, but sometimes local in Britain.

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

Local in Leicestershire and Rutland.