Last modified: April 8, 2021, 11:04 a.m.
A very rare species in the southernmost part of Belgium.
The larva of the first generation eats the fresh top leaves of the food plant, making holes in the leaves. Occasionally it also feeds on withered leaves. It hides during daytime, and only feeds during calm weather: no wind, sun or rain. Pupation on flower-stalks or on the main stem.
The larva of the second generation lives on the flowers of the food plant, causing them to drop.
Two generations a year: June and again in July–August.
Monophagous on Leonurus cardiaca.
Preferably in xerothermic limestone habitats.