Last modified: April 12, 2021, 5:08 p.m.
A common species in the northern part of Belgium, not so common in the southern part.
At first, the larva feeds in the flower-heads of Lactuca virosa, L. serriola or cultivated lettuce. Later, it burrows into the seed-head. It hibernates in a cocoon spun in the soil or amongst leaf-litter. Pupation in the cocoon.
The adults have been observed in July and August. They are active in the evening and later come to light.