Oligolectic on various Asteraceae (Scheuchl, 2000).
Westrich (1989) lists the following forage sources in Germany: Centaurea paniculata, Centaurea scabiosa, Carduus acanthoides, Onopordum acanthium (Asteraceae).
Monsevičius (1995) lists the following forage sources in Lithuania: Carduus sp., Centaurea sp. (Asteraceae); Anchusa officinalis; Echium vulgare (Boraginaceae); Knautia arvensis (Dipsacaceae)