Females of this genus deposit one, sometimes more, eggs in a wound they previously have gnawed in the wall of a flower head of a thistle. Generally the egg is covered with a soon-drying secretion. The larva develops in the flower head, feeding on the developing achenes, sometimes also the receptacle. Also pupation takes place inside the flower head.

references

Gültekin (2008a), Volovnik (2016a).