Last modified: Sept. 23, 2019, 12:12 p.m.
Used to be rarely observed but more recorded since the beginning of the 21st century, probably because of more intensive searches.
Greyish green with a dark green dorsal line. Head capsule and prothoracic plate dark brown.
A conspicuous blotch mine, situated mainly at the edge of a leaf and mostly low to the ground. Can be found from June till August.
See also bladmineerders.be
The egg is deposited singly at the underside of a leaf. When more than one egg is deposited on the same leaf the mines formed from the larvae may join into a large blotch mine. Some of these blotches contain a central darker brown spot; this is formed by a silken spinning in which the frass is concentrated. Other frass is spread separately in dark brown patches all over the mine. Pupation in a dead leaf which need not necessarily be of the same foodplant.
The moths are rarely recorded. They are active at night.
One generation a year: from early April till the end of May.
Forests and forest edges where the foodplant grows.