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The aim of the research was to study the influence of weather and climatic environmental factors on the formation of the apricot productivity of various origins. The objects of research were 45 apricot cultivars planted on the collection area in the Nikitsky Botanical Gardens. Phenological observations, yield accepting and determination of plant productivity of different apricot cultivars were done in accordance with generally accepted methods. When analyzing the data of phenological observations during the past 13 years due to climate change, acceleration of flowering and ripening have not been identified. The excess of monthly average precipitation with low monthly average air temperatures leads to a delay of the beginning of flowering of apricot plants by 1-3 weeks. The excess of monthly average air temperature during the period of formation (April-May) and fruit ripening (June-July), as well as a significant decrease in the amount of precipitation relative to their long-term average, accelerates the fruit ripening period. For the studied cultivars, it ranged from 1 to 3 weeks, in comparison with long-term data. Apricot cultivars and forms that better adapted to new growing conditions and have several valuable characteristics were selected: Large Early, Bucuria, Magister, Mandule Kajszi, Sanatate, Stokk, Ketch-Pshar (early or late ripening is combined with high yield; later flowering is combined with early or late fruit ripening). They are of interest for production testing, amateur gardeners and breeders.

Phenological features of development for the apricot cultivars in connection with the changing climate