Foreign varieties of potatoes in Western Kazakhstan

Due to the fact that in foreign potato growing there is a rapid replacement of some varieties with others, the process of searching for varieties attractive for producers should be continuous. This is necessary in order to avoid spontaneity when bringing planting material into the region. Therefore, in 2018, testing potato varieties of foreign breeding was resumed. The aim of the work was to assess the ecological plasticity of new varieties of potatoes of foreign breeding and their adaptation to the conditions of Western Kazakhstan. In 2018-2020, 15 potato varieties of foreign breeding were studied, their productivity, resistance to stress factors, diseases and pests were determined. All accompanying observations and counts were carried out. The weather and climatic conditions of these years developed extremely (continuous atmospheric and soil drought with dry winds during the growing season for all 3 years and during the tuberization period in 2020), which affected the yield of some early varieties. Watering and care allowed the potatoes to form a crop, which in the context of the studied varieties in the ESI nursery in 2018 was 18.1-31.3 t / ha, in 2019 - 16.2-38.9 t / ha, in 2020 - 16.0 -32.2 t / ha. The leveled results were obtained in the section of varieties (except for the group of very early ones), although in the section of replicates there were fluctuations in the main indicators. The number of tubers in the nest was small, while their marketability was high. Based on field experiments, promising numbers were identified, showing a reliable yield. The following varieties were identified: Gulliver (32.2 t / ha), which showed a stable yield under stress conditions for 3 years of testing, Lisana, RedFantazi, Madeira (25.2-27.0 t / ha).