Last modified: March 5, 2021, 10:05 a.m.
A very rare and local species in Belgium, for the first time recorded in 2012 in LG.
A rather large, elongate, full depth, brownish blotch, situated along the midrib or following the leaf margin. As the larva grows, more silk is deposited in the mine, with the result that the leaf contracts quite strongly and the leaf edge rolls over. Part of the frass is ejected with the remainder deposited in the oldest, narrow part of the mine.
Larvae from May till July. Pupation external.
They are on the wing from early July to late autumn and after hibernation from early spring till early May.