Food Plant: Achillea millefolium (Yarrow)

Egg: Upper side of leaf

Mine:Sept-May;June-August

Notes: Initially mines the leaf then feeds externally on the upper surface of the leaf (as shown). The leaves then whiten and shrivel, which can be taken as indicators of the presence of the larvae.

Data: 02.v.2022, Frilford Heath, Oxon., VC22. Adult emerged 10.v.2022

Image:© Will Langdon