COMPARATIVE EFFECTIVENESS OF SOIL HERBICIDES OF DIFFERENT CHEMICAL CLASSES IN SOYBEAN CROPS
2025
V.V. Mameev | Dronov, A.V. | Tolchenikov, A.V. | Nesterenko, O.A.
Field studies were carried out in the Bryansk region for period 2021-2023 on gray forest soils of educational and experimental agro-polygon of Bryansk State Agrarian University. This article presents results of evaluation and effectiveness of application of soil herbicides of the company "August" in soybean crops. The aim of work was to identify biological, economic and cost-effectiveness of soil herbicides from different chemical classes of JSC Firm "August" in pre- emergence use on soybean. The results of survey of weed community revealed the presence of 18 annual and perennial species belonging to six ecological and biological groups. Low-year type of weediness of crops was detected and late spring weeds were dominant among the weeds, accounting for 69.7-72.8% over the years, of which barnyard grass and bristle weed species were the most common. The biological effectiveness of herbicides was determined by Abbott formula and for applied soil herbicides it was 99.8% - Camelot, 98.6% - Gambit and 98.5% - Lasurit. The high effectiveness of Camelot herbicide was noted, which in the wet period at the time of "shoots-the third real triple leaf" had least phytotoxic effect on soybean plants and biological effectiveness reached 99.85% on the fortieth day. Herbicides contributed to an increase in seed yield with an increase in yield from 0.28 to 0.54 t/ha (11.3 - 21.9%) compared with the control (2.47 t/ha). The maximum seed yield of 3.01 t/ha and a conditional additional income of 17064 rubles were obtained from use of soil herbicide Camelot (containing two active ingredients: C-metolachlor and Terbutylazine with a consumption rate of 3.5 l/ha
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