Winter rape and beekeeping [honeybees, Apis mellifera, Brassica napus, pollination, Hungary]

abeille abejas animal animales animals apis apis mellifera arthropode arthropods bees brassica brassica napus cruciferae dicotiledoneas dicotyledons eastern europe europa europa oriental europe europe orientale fisiologia fonction physiologique hongrie hungary hungria hymenoptera insecte insectos insects invertebrados invertebrates physiological functions physiologie physiology polinizadores pollination pollinators pollinisateur pollinisation reproduction rhoeadales