Efficiency of the application of modern biologically active substances on soya in the conditions of the Orel region

The article considers the influence of biologically active substances on the resistance of soybeanplants to diseases of fungal epiphytotics, crop yield and quality. The purpose of the study was tosubstantiate the use of modern biologically active substances with immunomodulatory propertieson soybean. The objects of the study were soybean variety Swapa; organosilicon plant growthstimulator based on orthocreoxyacetic acid, triethanolammonium salt and chloromethylsilatran -Mival-Agro; growth regulator Biosil (100 g/ l of a mixture of triterpenic acids), which has growth-stimulating, fungicidal and bactericidal properties. The research was carried out in the scientificand experimental production center "Integration" (SEPC "Integration") Orel SAU. The use ofbiostimulators allows plants to cope with stressful loads, promotes their growth and development,and also accelerates the flow of nutrients into cells. As a result, productivity and product qualityincrease. The paper shows a decrease in the phytopathogenic activity of septoria,peronosporosis, cercosporosis in soybean agrocenosis under the influence of biologically activesubstances with immunomodulatory, fungicidal and stimulating effects as a result of seedtreatments and vegetative plants. The positive effect of the drug Mival-Agro on soybean yield wasrevealed, which increased by 24.7% during the treatment of seeds and vegetative plantscompared to the control, by 7.9% when treating seeds with Biosil and by 16.4% when using thedrug only during the growing season. In the experiments, the quality of products improved underthe influence of biologically active substances. The content of protein and oil when using Mival-Agro and Biosil increased by 1.1 time. The positive changes in the soybean agrocenosis areassociated with the functions and mechanisms of action of modern biostimulants, which regulatethe transport of phytohormones and nutrients, prolong their action in the plant. The preparationshave high biological, economic and economic efficiency.