Biological Efficiency of the Application of Herbicides on Spring Barley in the Chernozem Region

Abstract

In the conditions of the Central Chernozem Region of Russia, a study of the effect of herbicides on the weed component and productivity of barley plants was carried out. We used seeds of spring barley of the Vakula variety and Ballerina Super, Prima, Lancelot, and Ballerina Forte herbicides. Weed counts were carried out following the All-Russian Institute for Plant Protection methodological instructions: before treatment (initial weediness), 15, 30, 45 days after treatment, and before harvesting. Sheaf samples for laboratory analysis were taken at the onset of economic ripeness in all test plots in four replicates. The actual yield of barley was determined using sheaf samples. The obtained results were processed by the method of variance analysis. The research variants were determined as follows: control (no effect of herbicides), Ballerina Super (application of a herbicide), Prima (application of a herbicide), Ballerina Forte (application of a herbicide), Lancelot (application of a herbicide). Studies have shown that perennial and annual dicotyledonous weeds have significant distribution in the crops of spring barley in the Central Chernozem zone. Out of these, in terms of abundance, white goosefoot, drug fumitory, white campion, black-bindweed, field pennycress, field milk thistle, and dog nettle prevail. A comparative analysis of herbicides, both in terms of the biological effectiveness of preparations against weeds and the effect on plant productivity, revealed that the Lancelot, Ballerina Super, and Ballerina Forte herbicides had the biggest effect against a wide range of weeds.