The yellow larvae of the fly Liriomyza congesta mine the leaves of various Legumes such as Peas, Medicks, Lucernes and Vetches. The mine is on the upper surface of the leaf and the frass shows in a green strips.

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

Agromyza frontella / Agromyza nana / Liriomyza pisivora / Phytomyza brischkei

ref.: Warrington, B.P. (2023).  Liriomyza congesta. 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.

Wherever 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.

Leafmines may be found between May and November.

Widespread, but sometimes rather local in Britain.

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

Fairly frequent in Leicestershire and Rutland.