An oligolectic species; Ebmer, (1984) cites visits to Campanula trachelium, Campanula rotundifolia (Campanulaceae) and Mentha sp. (Lamiaceae). The latter species probably as a nectar source.
Westrich, (1989) states that the species is strongly oligolectic on Campanulaceae, and lists Campanula rotundifolia and Campanula trachelium as forage plants.
Oligolectic on Campanulaceae, especially Campanula sp. (Pesenko, Banaszak et al.,1995; 2000). Pekkarinen (1998) lists only Campanula (Campanulaceae) as a pollen source in Finland.