Last modified: May 8, 2019, 7:35 p.m.
A local and rare species in Belgium, mainly, though not exclusively, found on limestone and chalk soils.
See also bladmineerders.be
The larva mines the leaves. Initially the mine starts as a gallery almost filled with frass and finally changing into a blotch often occupying the whole leaf surface, with the frass dispersed and heaped. The larvae of the second generation also lives inside the flowers and seeds. Pupation in a cocoon spun to leaf litter. The adults are active at night and come to light.
Two difficult to separate generations a year: from late April to the beginning of October, but are most abundant from May till the first half of June and again from the second half of July till the end of August.
Mainly in xerothermic limestone areas.