Strongly oligolectic on Anchusa (Boraginaceae), with Anchusa officinalis cited as a forage plant. (Westrich, 1989). Dylewska (1987) lists the following plants as providing forage resources (presumably nectar): Melilotus (Fabaceae); Brassica (Brassicaceae); Nonea pulla (Boraginaceae).
Tomozei (2014), citing others, states that the species forage on Boraginaceae, Brassicaceae and Fabaceae species (Osytshnjuk 1977, Dylewska 1987, Osytshnjuk et al. 2008). Schmid-Egger and Scheuchl (1997) state that the species is oligolectic, in that it prefers to forage on Anchusa (Boraginaceae) species.