The Effect of Fungicides Mixed With Growth Regulators on the Productivity of New Varieties of Winter Wheat

Abstract

Research was carried out to study the possibility of reducing the harmfulness of pyrenophorosis, increasing the yield and quality of winter wheat grain using growth regulators and fungicides. The work was carried out in 2020-2022 in conditions of insufficient and unstable moisture in the steppe zone of Kabardino-Balkarian Republic. Two experiments were carried out using growth regulators (without treatment; Albit, TPS; Bigus, VR; Tsircon, R; Epin-Extra, R; Ribav-Extra, R), as well as chemical (Spirit, SK) and biological fungicides (Fitolavin, VRK Baksis, Zh Kasumin 2L, VR Vitaplan, SP) in combination with the growth regulator (Gumi, R). As a result of the studies, the following indicators were studied: biological productivity, weight of 1000 grains, gluten content, susceptibility to yellow spot - Pyrenophora tritici-repentis (Died.) Drechsler, biological effectiveness of drugs. When using Epin-Extra, P, the weight of 1000 grains in the Yuzhanka variety was 40.7 g, when applying Bigus, BP on Pamyati Shatilov’s wheat - 42.4 g, Albit, TPS on the Taulan variety - 42.1 g with an average value of the indicator in the variant without drugs for all studied varieties was 37.8 g, with drugs – 40.4 g. On the Pamyati Shatilov variety, the growth regulator Albit, TPS, stood out, with the use of which the productivity was 6.0 t/ha, the increase over the control was 0.6 t/ha. The biological effectiveness of the chemical fungicide Spirit, SK on the Yuzhanka variety was 84.8%, and on the Pamyati Shatilova variety 89.1%. For the biofungicides Kasumin 2 L, VR and Fitolavin, VRK against pyrenophorosis, it was equal to 9.6% and 18.4%, respectively, which is much lower than for the chemical fungicide.