Host plants:
The larvae feed on Artemisia alba (= A. camphorata), rarely also on other Artemisia.
Habitat:
Cucullia formosa inhabits dry slopes and rocky grasslands.
Life cycle:
The moths fly quite late in the season between late July and September. The larvae are usually recorded in September and October. I even observed quite young larvae in mid-October 2013. Thus in some years larvae should still occur in early November.
Endangerment factors:
Cucullia formosa has alredy lost many sites due to reforestation after abandonment of extensive grazing.
Remarks:
Cucullia formosa occurs from Southern France very locally across the Southern Alps to the east to Greece and is also found in parts of Asia.