Last modified: April 16, 2021, 9:39 a.m.
A very rare and local species in Belgium, with most observations in the southern part of the country.
The larva of the first generation lives in the stems, and the second generation lives in the flower buds and on the seed heads.
Pupation takes place in the excavated stem parts.
The adults are active at dusk and night and come readily to light.
Two generations a yerar: from May to July and again in August–September.