Abstract
This article is devoted to the problem of field winter hardiness of sour cherry and sweet cherry flower buds as the main element of winter hardiness of fruit plants in the Oryol region. The issue is considered from the point of view of winter hardiness in extremely cold winters of 2009-2010. and 2020-2021, which allow you to more accurately determine the level of winter hardiness of each individual variety, which is rarely possible in mild comfortable winters. More than 30 varieties of sour cherries and sweet cherries from the gene pool of the All-Russian Research Institute of Fruit Crop Breeding were taken as objects of study. In both cultures, a number of varieties with high winter hardiness of flower buds were identified – sour cherry varieties Griot Ostgeimsky, Volochaevka, Otrada, Shokoladnitsa, Otrada, Uifekhertoy Furtosh and sweet cherry varieties – Zarya Vostoka and Orlovskaya Yantarnaya.
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