Last modified: April 20, 2020, 7:01 p.m.
A very rare, xerothermic species in some dry limestone areas in the southern part of Belgium, only found where the foodplant grows.
The caterpillar makes large case of 10-18 mm long. The case is light brown.
The mouth angle is 45°.
See also bladmineerders.be.
The larva does not only mine the leaves, but also feeds on the developing seeds. It builds the case from leaf fragments.
Pupation in the case, usually attached to the foodplant or nearby vegetation.
The adults fly mainly during July and August in one generation a year.
Dry, xerothermic open places on limestone soil.