Last modified: March 11, 2023, 3:10 p.m.
A fairly common species in Belgium.
The larva lives in a distinctive greyish silken and pistol-shaped case that can reach a length of about 7 mm.
The mouth angle is 80°.
See also bladmineerders.be.
Larvae are fully grown in early June and pupation takes place inside the case, usually at the upper side of a leaf, less often at the underside or on a twig.
The adults come sparingly to light.
The adults fly in July and August in one generation a year.
The larvae are restricted to food plants of the genus Quercus.