Study of the timing and duration of individual phases of the development of introduced cultivars of nectarine and their resistance to leaf curliness

The disease curly leaves (Taphrina deformans Berk.) leads to a weakening of the nectarine plant, decrease in its yield. This study was conducted order resistance this new cultivars nectarines for Azerbaijan, such as Redhaven, Gardeta and Luciano. 15 fruit-bearing trees each cultivar were taken under observation at experimental farm Research Institute Fruit Tea Growing, located near city Guba. It found that period from beginning end flowering varieties is same – 9 days 2021 14 2022. leaf bud blooming fell on 18-19.III, 2022 23-24.III. Although all bloomed 5 earlier (23-24.III) than 2022, first year fruits ripened mid-July, second - June (Redhaven Gardeta) decade July (Luciano). In Redhaven Gardeta's began fall 3 later, Luciano's month (25.XI) 2021. According degree prevalence leaves, are arranged following order: Luciano 4.6%, 4.9% 5.2%. results obtained help better understand characteristics region.