THE EFFECT OF BIOLOGICAL PRODUCTS ON THE OF SPRING WHEAT CROPS CONTAMINATION

The aim of research is to determine the effect of biological products on weed infestation of spring wheat crops. Objectives: to study the effect of pre-sowing seed treatment, growth stimulator, biological fertilizers, biofungicides and the combined use of biological products with herbicide on the number, weight and proportion of weeds in spring wheat agrocenoses; to calculate the contribution of factors to reducing the number of weeds in wheat crops. The studies were conducted in 2022–2024 at the Borsk Educational Scientific Production Center, located in the forest-steppe zone of the Krasnoyarsk Region, in a field experiment to study the effect of biological products during pre-sowing seed treatment and vegetation treatment on weed infestation of agrophytocenoses of spring wheat variety Novosibirskaya 31. Weed infestation of spring wheat crops depended on the cultivation technology and weather conditions of the research years. The greatest contribution to the reduction in the number of weeds in spring wheat crops was made by the "cultivation technology" factor (35.2 %) and the interaction of the "cultivation technology × year" factors (33.7 %). The use of biopreparations in all experimental variants reliably reduced the number and weight of weeds in wheat crops compared to the control without treatment. The proportion of weeds in the variant with pre-sowing seed treatment and treatment with the growth stimulator Biodux during vegetation decreased by 1.9 times. The proportion of weeds decreased by 2.2 times in the variants with pre-sowing seed treatment and treatment with the growth stimulator Biodux, biofertilizers during vegetation (3rd va¬riant) and with pre-sowing seed treatment and treatment with the growth stimulator Biodux, biofertilizers, biofungicides and herbicide during vegetation (5th variant). With pre-sowing seed treatment and treatment with the growth stimulator Biodux, biofertilizers, biofungicides during vegetation (4th variant), the proportion of weeds to the control decreased by 2.3 times.