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a cultivar suitability to certain environmental conditions can be judged by the terms of plant development phases. the paper studied some biological characteristics of pear cultivars, passage of phenological stages during the growing season, specifics of flowering and their compliance with natural and climatic conditions of cultivation. the following valuable pear cultivars with late flowering terms were allocated: ‘Wiliams stavropolskiy’, ‘luberskaya’, ‘Podkumok’, ‘Velesa’, ‘Zimnyaya mliyevskaya’ and ‘Zaporozhskaya’ for state and production study, as well as original forms for further use in breeding.

Studying some biological features of pear cultivars blossoming in the south of Russia