Особенности формирования фитосанитарной ситуации в посадках цветных сортов картофеля и его продуктивность при различных системах защиты растений

Data were obtained on the peculiarities of the development of black scab on four varieties of colored potatoes (Violet, Purple Majesty, All Red and Rosamaria) when culvaed using chemical and biologized plant protection systems. It is shown, that the development of black scab and its infestation of stolons on varieties grown with the use of chemical plant protetion agents is lower than with the use of biological preparations, respectively, by 2.4-6.5 times and by 4%. The biometric indicators of plants when they were grown using the chemical protection system were slightly higher than those on biologized ones. The individual reaction of varieties to the studied protective techniques was revealed. Among the four studied cultivars, the cultivar All Red stood out, in which the phytosanitary condition of plantings, productivity indicators on both protection systems were similar.