Effectiveness of biological products for control of the most significant mycoses on potato crops

Experiments on comparative assessment of effectiveness of bioagents to control the most significant fungal diseases were carried out on crops of potato breeding line in the Zernograd district, Rostov region. Biofungicide Metabakterin, WP based on Methylobacterium extorquens NVD VKM B-2879D + Validamycin Streptomyces hygroscopicus subsp. limoneus VKPM AC-1966 + Bacillus subtilis VKPM B-2918 IPM 215 and biofungicide Vitaplan based on Bacillus subtilis , strain VKM-B-2604D + Bacillus subtilis , strain VKM-B-2605D were studied in the research. The results showed that Metabakterin, WP at the rate of 80 g/ha was the most effective for control of early blight, late blight, fusarium dry rot and rhizoctonia canker on potatoes, while protection period of the biofungicide against these fungal diseases ranged from 19 to 27 days. It was noted that application rate of 80 g/ha of Metabakterin, WP provided the maximum increase in potato yield.