Ecological features of sunflower pollination by the family apoidea

Pollinators of sunflower agrocenoses of Western Precaucasus are 35 species of the family Apoidea, the most widely spread species are Apis mellifera, Bombus terresrtris and Eucera clypeata. A dispersion analysis showed, that bee quantity on the crop and intensiveness of pollination are in reliable dependence on sunflower variety, flowering stage, day's hours, nectar amount and species of pollinator. Our researches proved that pollinated by insects heads are differed with good seeds performance and weight in comparison with unpollinated heads (control).