The focus of this thesis was to investigate the importance of honeybees and wild pollinators on blackcurrants (Ribes nigrum), strawberries (Fragaria x ananassa) and blueberries (Vaccinium corymbosum). Furthermore, we were interested in pollinator diversity, daily and seasonal activity in various weather conditions and the frequency of flower visits for different pollinator groups. Observations were conducted in the years 2017 and 2018 in the research orchard of the Agricultural institute of Slovenia located at Brdo pri Lukovici. The most frequently observed pollinator was the honeybee. Bumblebees were frequent on blackcurrants and blueberries, whereas solitary bees and hoverflies were often seen on strawberries. Other pollinator groups appeared less often. Honeybees and hoverflies were most active in the middle of the day, whereas bumblebees were mostly active in the morning or in the evening. Colder days were an exception, when their daily activity pattern resembled that of the honeybee. Bumblebees had the highest frequency of flower visits, even up to three times higher than that of honeybee. Solitary bees had the lowest frequency of flower visits. In evaluating pollinator importance, it is crucial that we take into consideration their effectiveness and individual features of specific pollinator groups, because only wide variety of pollinators can ensure effective pollination.
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