The larvae of the fly Phytomyza chaerophylli mine the leaves of umbelliferous plants such as Cow Parsley. The mines often follow the margin of the leaf at first, but then expands into a blotch that covers a large area of the leaf. The mine is pale and frass is usually seen in two untidy rows of isolated grains.

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

Phytomyza angelicastri / Phytomyza conii / Phytomyza obscurella / Phytomyza thysselini

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

Leafmine Adult

Leafmine: Please provide a photograph of the leafmine and also state the host plant.

Where the 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.

The leafmines may be found in any month of the year.

Widespread and common throughout Britain.

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

Common in Leicestershire and Rutland.