The effectiveness of autumn application of the herbicide Alistair Grand, MD depending on the consumption rates and phases of development of winter wheat on dark gray forest soils of the Ryazan region

Abstract

As a leader in the development of high plant protection technologies, Bayer CropScience was the first in Russia to introduce the herbicide Alistair Grand, MD, specialized specifically for autumn use on winter grain crops. Experiments to study the effectiveness of the herbicide were laid in the fields of the ISA, a branch of the Federal State Budgetary Scientific Institution FNATS VIM in the Ryazan Region in 2020–2021 and 2021–2022. on dark gray forest heavy loamy soil. Under pre-sowing cultivation, 1.0 c/ha of azofos was applied. In the phase of spring tillering, winter wheat crops were fertilized with ammonium nitrate of 1.0 c/ha. Herbicide Alistair Grand, MD was applied in doses of 0.8 and 1.0 l / ha (spraying) in the phase of 1-3 leaves of the culture. In the same doses, Alistair Grand, MD (spraying) was used in the tillering phase of the crop. On the control variant, the herbicide was not used. Two-year tests of the autumn application of the herbicide Alistair Grand, MD in the phase of 1-3 leaves and in the tillering phase with a rate of application of 0.8 and 1.0 l / ha on winter wheat crops showed its high efficiency in the destruction of annual dicotyledonous and annual cereal (common broomstick) weeds. Annual dicots were inhibited to 97.9% in number and up to 96.6% by weight. tenacious bedstraw – by 11.5–12.5 pcs/m², wild spin – by 17–19 pcs/m², field and shepherd's purse violets – by 5.5–6.0 pcs/m², common broom – by 14–15 pcs/m². Surveys at the resumption of vegetation and before harvesting showed the complete destruction of the common broomstick. From the use of the drug, an additional grain yield of 106.9–114.7% was obtained.