Assessment of the fungicides efficiency on winter rapeseed against the main fungal diseases in the central zone of Krasnodar krai

The aim of the study was to assess the efficiency of fungicides Prozaro, EC; Acanto plus, SС; Pictor Active, SС against a complex of pathogens on winter rapeseed. The studies were carried out at the field stationary of the Federal State Budgetary Scientific Institution “Federal Research Center of Biological Plant Protection” (FSBSI FSCBP) in the central agroclimatic zone of Krasnodar Krai. The experiments were carried out on the winter rapeseed variety Onyx bred by the Federal State Budgetary Scientific Institution “Federal Research Center “V.S. Pustovoit All-Russian Research Institute of Oil Crops” (FSBSI FRC ARRIOC). Significant damage to the studied crop is known to be caused by biotrophic pathogens Phoma lingam, (Tode) Desm, Sclerotinia sclerotiorum (Lib.) and Alternaria fungi throughout most of the growing season. Assessment of the biological efficacy of fungicides Prozaro, EC; Acanto plus, SC; Pictor Active, SС revealed that significant effect on these diseases was achieved by using preparations containing prothioconazole 125 g/l + tebuconazole 125 g/l at an application rate of 0.8 l/ha, picoxystrobin 200 g/l + cyproconazole 80 g/l at an application rate of 0.6 l/ha and pyraclostrobin 250 g/l + boscalid 150 g/l at an application rate of 0.8 l/ha with a single treatment of rapeseed crops in the stem formation - beginning of crop budding phase (BBCH 50). Their biological efficacy against phomosis ranged from 74.1 to 81.5%, alternaria from 82.7 to 85.2%, sclerotinia from 81.5 to 87.7%. The use of fungicides containing these active ingredients contributed to the winter rapeseed yield of 22.5 to 22.8 c/ha, which was higher than the control (without treatment) by 0.8–1.3 c/ha, while the preserved yield was 3.7–6.0%.