The effectiveness of new generation herbicides in reducing the contamination of spring rape crops in the conditions of the Krasnoyarsk forest-steppe

Abstract

Results. The results on the effectiveness of herbicides of a new generation in reducing the contamination of hybrids of spring rapeseed of German selection of Licorice and Cultus CL in the soil and climatic conditions of the Krasnoyarsk forest-steppe are presented. The research was carried out at the pilot site of the Borsky training and production complex of the Krasnoyarsk State Agrarian University (2021–2022) field experiments to study the effect of herbicides on weed vegetation and the yield of oilseeds of new spring rapeseed hybrids in the conditions of the Krasnoyarsk forest-steppe. The objects of research are herbicides of the chemical class imidazolinones. The species composition of the weed vegetation of rapeseed agrocenosis has been determined. The type of blockage is juvenile. Spraying of crops from weeds was carried out in the phase of development of spring rapeseed «3–4th real leaf». Method of application — once together with a selective herbicide at a dose of 0.35 l/ha and a continuous herbicide at a dose of 0.06 l/ha, an adjuvant at a dose of 0.2 l/ha per 200 liters of working solution was used to enhance the contact of the drug with the plant surface. Under the influence of a mixture of herbicides in the agrophytocenosis of spring rapeseed, a decrease in the weed component by 98.4% was found. On plots with the use of herbicidal preparations, an increase in the yield of oilseeds in the Hybrid Cultus CL was recorded by 2 times.