Probably oligolectic on Fabaceae (Mueller, 1996, Amiet et al., 2004; Banaszak & Romasenko,1998). Pollen analysis (Muller, 1996) revealed the following pollen sources: Fabaceae with traces of Scrophulariaceae pollen.
Westrich (1989) lists Lotus corniculatus (Fabaceae) as a pollen source.
Gogala (1999) reports that he has seen the species foraging at flowers of Vicia sp. (Fabaceae) in Slovenia.