Last modified: Jan. 24, 2020, 10:40 a.m.
First observation in Belgium in 2014 in LX. Hitherto a a very rare and local species in our country, only known from a few localities.
The mine starts as a straight gallery; the frass is concentrated at the beginning of the mine. Later on the mine broadens to ea irregular blotch often occupying the entire leaf tip. See also bladmineerders.be
Some larvae sometimes make more than one mine. When full-fed the larva leaves the mine and spins a tough white elongate cocoon on one of the leaves or amongst debris on the ground. The species hibernates in the larval stage. Pupation in the cocoon after hibernation.
Adults can easily be swept from the foodplants during the day.
One generation a year: from the end of May till August.
Humid places, fens, damp woodland, ditches, banks of rivers.