Polylectic in the Anatolian parts of its range, but strongly oligolectic in the Alps, foraging on Cerinthe glabra (Boraginaceae).
Rasmont (1988) lists the following forage species: Gentiana lutea (Gentianaceae); Cerinthe sp., Cerinthe minor, Cerinthe minor auriculata, Cerinthe glabra, Echium vulgare (Boraginaceae); Nepeta sp. (Lamiaceae); Rhinanthus sp. (Scrophulariaceae)