Yield of winter rape in Ryazan region

Abstract The scientific work presents the experimental data on growing varieties and hybrids of winter rape in Ryazan region. The experiment studied the action of fungicide Caramba having a growth stimulating effect on winter rape plants. Weather conditions in 2018-2020 were satisfactory for the development of winter rape, which contributed to its rather good overwintering. During the years of winter rape monitoring, the development of diseases was not marked significantly. On average, according to experiments, the development of Alternaria blight on winter rape was recorded over the entire surveyed area, with a degree of development of 1.5-3.2 % and prevalence of 1 to 6 %, gray rot with a degree of development of 0.3-0.5 % and prevalence of 0.2-0.3 %, on variants without treating with Caramba. Rokhan F, Citro F, Visby F and Zorny were the best in terms of the yield structure. In the experiments, on average, the most productive were the hybrid of the German selection Rokhan (26.8-27.8 dt/ha), Citro (23.9-24.7 dt/ha), Belarusian cultivar Zorny (22.7-23.3 dt/ha). On average, a high survival rate was recorded when treating with fungicide Caramba according to variants with Safran (78.7 %), Rokhan (80.9 %), Zorny (75.5 %).