Last modified: March 4, 2021, 11:46 a.m.
A fairly common species throughout Belgium.
See also bladmineerders.be
The larva, when young, makes a mine in the leaf of the host plant. It hibernates in the bark just below a bud, and in spring it continues feeding within a shoot or in a lightly spun shoot, often causing it to droop or showing distorted growth.
Pupation in a netted cocoon.
The adults come to light.
The adults fly in two generations a year: from mid May till July and again from late August till late September.
Leaves and shoots of Fraxinus excelsior.