Last modified: Feb. 24, 2023, 5:14 p.m.
A not so common species in Belgium, but probably much more widespread.
Native
The mine is a very contorted gallery which widens gradually, often forming a false blotch by merged 'S' turns, or even a true blotch. The frass lays central and is broken.
See also bladmineerders.be
The cocoon is brown to black.
The egg is deposited on the upperside, usually beside a rib.
The larva makes a leaf mine on the upperside of the food plant.
The adults fly in one protracted generation during June and July.
The larva lives on Populus tremula, occasionally also on P. alba and P. canescens.