Last modified: April 12, 2021, 5:04 p.m.
A very rare and declining species in Belgium, mostly recorded in the southern part.
The adults fly from the end of April till early June. They are easily disturbed in sunshine. They fly at sunset and later come to light.
The larva lives at first in the flower head of Solidago virgaurea. It has also been observed on Aster novi-belgii, or Crinitaria sp. At a later stage it burrows into the stem. It hibernates full-fed in a cocoon spun in the soil or amongst leaf-litter. Pupation takes place in the cocoon.