An oligolectic species, specialising on Salix (Salicaceae) pollen (Osytshnjuk 2005, Schönitzer and Klinksik 1990). Scheuchl (in prep.) (citing Dylewska 2000). additionally listsTussilago and Taraxacum (Asteraceae) as forage sources.
Strongly oligolectic on Salix (Salicaceae)(Westrich, 1989).