Biological Efficacy of New Generation Fungicides on the Development of Leaf-Rolling Diseases of Winter Soft Wheat

The article presents the data on the research of biological effectiveness of two-component fungicides Altrum Super, SE and Alkor Super, SE in crops of winter wheat variety Alekseich in the phase of the end of earing - beginning of flowering in the climatic conditions of the Central part of the Non-Chernozem region. The field experiment was carried out in 2021-2022 at the All-Russian Research Institute of Agrochemistry named after D.N. Pryanishnishnitsky. D.N. Pryanishnikov, Agricultural Engineering Department, sod-podzolic-loam soil, 1st agroclimatic zone, Domodedovo Microdistrict, Moscow Region. Barybino. Combined systemic fungicides Altrum Super, KE and Alkor Super, KE with the same active substance, but different manufacturers and winter soft wheat variety Alekseich were the objects of research. The investigations were carried out by generally accepted methods. As a result of studies, it was found that the first manifestations of diseases in wheat crops were observed in the second decade of June. Depending on the date of registration, application of new generation fungicides in winter crops provided biological effectiveness against pyrenophrosis 62,1-84,5%, powdery mildew 63,1-83,3%, stem rust 63,0-83,0%, brown rust 65,3-84,0%, septoriosis 62,4-85,9% and yellow rust 62,7-81,4%. The maximum yield in the experiment was achieved with a single treatment of the crop fungicides Altrum Super, KE and Alkor Super, KE at a rate of 0.5 l/ha. In relation to the control, Altrum Super, SE (250 + 80 g / l) -0.4 l / ha, Altrum Super, SE (250 + 80 g / l) - 0.5 l / ha and Alkor Super, SE (250 + 80 g / l)- 0.5 l / ha allowed to increase the yield by 11.80%, 15.80% and 14.10%, respectively.