The fly Amauromyza labiatarum has larvae which mine the leaves of various plants including Dead-nettles and Woundworts producing a mine with a narrow gallery leading to a largish blotch on the upper surface. Frass is green and indistinct in the gallery - small grains may be seen at the gallery edge. The mines are recorded more frequently than the adult flies.

Agromyza flavipennis, Amauromyza morionella, Phytomyza obscura

(ref.: Warrington, B.P. (2023). Amauromyza labiatarum. Accessed at https://agromyzidae.co.uk/species/agromyzidae/phytomyzinae/amauromyza-2/cephalomyza/cephalomyza-labiatarum/ on 11/12/2023)

Leafmine Adult

Leafmine: Provide back-lit photographs of the whole leaf-mine and the larva and note the host plant.

Wherever the larval foodplants occur.

Click on the link in the 'Further information' section below.  Then click on the Phenology tab which will provide phenology details for both adult and larval stages.

The leafmines may be found between May and December.

Larval foodplants include Prunella (Self Heal), Stachys (Woundwort), Lamium (Dead-nettle), Glechoma (Ground Ivy), Galeopsis (Hemp-nettle), Ballota (Horehound), Teucrium (Germander/Wood Sage), Lamiastrum (Yellow Archangel), Ajuga (Bugle), Verbena officinalis (Vervain).

Widespread and fairly frequent in Britain.

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

Status in Leicestershire and Rutland not known.

National Agromyzidae Recording Scheme