Last modified: April 12, 2021, 11:48 a.m.
A very rare and local species in Belgium.
At first a narrow gallery turning in semi-circles around the oviposition place; later widening into a blotch. The black frass is concentrated in a central line.
See also bladmineerders.be
The larva mines the leaves of its food plant. It pupates in a whitish cocoon spun to a leaf or to leaf litter on the ground.
The adults come to light.
One generation a year: from mid June till August.