Assessment of the resistance of cherry varieties to return frost in the Astrakhan region

Abstract

The article presents the results of studying the resistance of cherry varieties to the spring return frosts of 2019 ... 2020 in the conditions of the sharply continental climate of the Astrakhan region. The aim of the research was to identify the most adapted cherry varieties for cultivation under conditions of abiotic stresses that affect the setting and fruiting. The results of the preservation of generative buds under the influence of low temperatures are presented. The total damage score reached 5 points. It is established that the sensitivity of the studied cherry varieties to low air temperatures depends on the timing of the onset of the main phenological phases. All cherry varieties showed an insufficient level of resistance to return frosts up to -5...-7°C. The exception was the variety Molodezhnaya, which had the lowest degree of damage (1...2 points). During the two years of study, the maximum productivity in the experiment was characterized by the Loznovskaya variety (3.2 kg / tree).