Last modified: Nov. 16, 2020, 1:13 p.m.
A common species throughout Belgium. Can sometimes be a pest in gardens where cabbages are grown.
The larva feeds in the heart or amongst young spun leaves of the foodplant. Larvae from the Autumn generation hibernate in their cocoons. Pupation takes places in a cocoon beneath the surface of the soil. The adults are active at dusk and come to light.
The adults fly in two generations per year: from late April till the end of June and from early August till the end of September.