The species is oligolectic of knapweeds and thistles (Asteraceae)(Praz 2008). Müller (1996) states that this is probably an oligolectic species, specialising in Cardueae (Asteraceae) pollen.
Pollen analysis (Müller, 1996) using a single sample only, revealed Asteraceae to be the only pollen source
Kasparek (2017) summarises flower visitation: In Turkey recorded visiting Centaurea solstitialis ssp. solstitialis, Centurea solstitialis ssp. carneola, Onopordum carduchorum, Onopordum anatolicum and
Cephalaria alpina (Asteraceae)(Özbek & van der Zanden 1993, Güler et al. 2014).