Last modified: April 22, 2020, 6:29 p.m.
A very rare and local species in Belgium.
The almost straight forewings are ochreous/greyish till more yellowish. There are broad white lines and a clear white costa line. The antennae are vague ringed alternating at the topside, at the bottom there are no dark spots. Wingspan is about: 11–14 mm.
The larva lives in a greyish case of 6 mm. This case is made of silk and is tubular and trivalved. The mouth angle is about 30°.
See also bladmineerders.be.
The eggs are deposited on a flower of the host plant. The larva feeds on the seeds in the capsule. Caterpillars live from July till mid-September. Then they overwinter at ground level in the case spun in the surrounding vegetation. They are fully grown in May. Pupation takes place in July at ground level.
One generation a year: from the beginning of May till the end of July.