common species throughout Belgium.
larvae feed on Corylus avellana, when young, in a
small squarish or triangular blotch at the underside of a leaf, later on, in at least two successive
folds constructed upwards on the leaf margin. Pupation in that folded
adults fly in two generations a year: in May and again in July-August.
They come to light.
Namur, Olloy-sur-Viroin, 29 October 2006.
2 early mines (squarish & triangular) and final leaf folds
(Photo © Chris Steeman)