Last modified: Nov. 14, 2023, 12:01 p.m.
A fairly common species throughout Belgium.
Native
The eggs are laid in the stem crevices and on the leaves . The larvae hatch from the eggs in seven to ten days and move immediately to the root crown and mine into the root, hibernate full-fed in a silken cocoon, and pupate in that cocoon during next spring.
The adults may be found resting vertically on the knapweed stems or under the leaves.They are active from sunset onwards and later occasionally come to light. Adults live from eleven to fourteen days.
The adults from mid-May till the end of August, occasionally later.
The larva lives mainly on Centaurea nigra, less often on Scabiosa.
It inhabits disturbed sites, grasslands, riparian sites, open places.