fairly common species in Belgium.
amber yellow larva makes a leafmine usually starting close to
the midrib or near the leaf edge on the
upper or underside side of small-leaved willows like Salix alba, S. babylonica, S. fragilis, S. pentandra and S. viminalis. Pupates
in a dark reddish brown cocoon covered with fluffy silk.
adults fly in two generations a year; during May and June and again in
mine: starts as narrow gallery, almost completely filled with black
frass. It soons widens and frass is lying broken linear leaving clear
margins. Finally it expands into a small blotch which regurarly absorbs
the earlier gallery.
West-Vlaanderen, Ooigem, 16 October 2008.
mine with larva visible on narrow-leaved willow
(Photo © Steve Wullaert)