Last modified: April 11, 2021, 11:24 a.m.
A very rare and local species in Belgium, but probably overlooked in many regions. Recent observations only from the northern part of the country.
Forewing ground colour almost unicolorous greyish brown, some longitudinal dark brown lines.
The eggs are oviposited singly.
The larva mines at first in the flowering stems and umbels of their host plant. In a later stage, the larva feeds within a tough silken spinning externally among flowers and developping seeds. Larval stage from the end of May till early August.
Pupation in a flimsy silken cocoon in a hole in the main stem of the food plant. If the potential pupation side is too small in diameter, it pupates in the soil or among plant debris on the ground. Pupal stage in July–August.
The species hibernates in the adult stage. Adults are active at night and come to light.
One generation a year: from late August till April.
Several species of Oenanthe, like: O. aquatica, O. crocata, O. fistulosa or O. pimpinelloides. The caterpillar has also been recorded on Carum verticillatum or Sison amomum.