Food Plant: Jacobaea aquatica (Water Ragwort), J.erucifolia (Hoary ragwort), J.vulgaris; Senecio viscosus (Sticky ragwort), S.vulgaris (Groundsel)

Mine: Summer

Notes: The flowerhead becomes swollen at the base and the bracts are wider as a result of the larva mining internally. The infected flowerhead may contain the white fly larva or a brown puparium.

Data: 25.vii.2022, Norwich, Norfolk, VC27

Image:© Vanna Bartlett