Last modified: Sept. 17, 2019, 11:11 a.m.
Used to be a very rare and local species in Belgium, only known from the southern part of the country, with a stronghold in the province of Namur where it is locally not rare. During the last decennia, the species has spread all over the country and it is recorded now (2018) in all provinces, sometimes not rare at all.
Forewing ground colour ochreous brown, becoming a little darker brown in the apical area; no distinct pattern.
Yellow, with light brown head capsule and darkened last abdominal segment.
A very typical brown blotch with fine concentric arcs on the upperside of a leaf, around the place where the egg was oviposited. This place turns darker brown in later stages. Frass is ejected from the mine.
See also bladmineerders.be
The egg is oviposited on the upperside of a leaf.
Pupation takes place in a semi-circular chamber constructed in the larval feeding place. The species hibernates in the larvalstage, inside the pupation chamber which is not detached from the leaf. It pupates in early spring.
The adults are active at dusk and come to light.
One generation a year: May–June. During favourable years, a second generation develops of which the moths are on the wing in August.
Forest margins, forest clearings, open places where Quercus trees are growing.