A rare and local species in Belgium, but probably overlooked in many
regions. Recent observations only from the northern part of the country.
larva mines at first in the flowering stems and umbels of various species of Oenanthe and Carum verticillatum and occasionally on Sison amonum.
In a later stage, the larva feeds within a tough silken spinning
externally among flowers and developping seeds. Pupates 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.
adults fly in one generation a year; from August till September and
after hibernation again from March towards April. They fly by night and
later come to light.
West-Vlaanderen, Ingelmunster, 08 July 2005.
(Photo © Kurt De Smet)