Food Plant: Glyceria maxima (Reed Sweet-grass)

Egg: on tip of leaf

Mine: April-May;July-August

Notes: The mine is downwards, towards the stem, and difficult to see. It is initially a pale green and later turns brown. When the larvae reach the water-line, they may then mine upwards or swap leaves (and then mine upwards). The frass is scattered in the mine. The pupa is in a slight cocoon, on an unmined leaf, about 60cms above the water line. Found in the borders of steams, ponds etc. A mine on Glyceria maxima.

Data: 20.iv.2023, Marston Meadows, Oxfordshire, VC23

Image:© Will Langdon