Fungal Diseases Tolerance Studies of Potato Genotypes

The article is devoted to the study of fungal diseases tolerance of potato samples and discusses the major potato diseases worldwide: late blight, early blight and powdery scab. During the research, the effects of fungal diseases on the quantitative and qualitative characteristics of the plant, some physiological parameters, and pest characteristics were studied. In the studied varieties, the dynamics of specific leaf mass and biomorphological indicators increase in during ontogenesis depend not only on the developmental phase and genotypic characteristics of the plants, but also on the state of diseases infected. The article states that the highest overall incidence was against late blight, with relative resistance to powdery scab, this is due to the nature of the pathogens. During the study, it was determined as a result of biomorphological indicators in the selected samples introduced from selection centers and local potato genotypes for their resistance to late blight, early blight and powdery scab of that the plants were 43-63 cm tall and quantity of stem were 1-3. The difference between the specific leaf mass of the control and experimental variants in the varieties taken during the study was comparable across the study years and development phases. Complex control measures based on high agricultural technology methods are more effective in reducing the risk of potato diseases and preventing their development. Studies have shown that the main methods of protecting potatoes from diseases are the cultivation of resistant varieties, optimal planting dates, and the use of mineral fertilizers and chemical plant protection products.