EFFECTS OF CHEMICAL AND BIOLOGICAL CROP PROTECTION PRODUCTS ON YIELD COMPONENTS AND GRAIN YIELD OF SPRING BARLEY IN CENTRAL SIBERIA

Abstract

This article analyzes the effects of chemical and biological crop protection products (CPPs) on yield components and grain yield of the spring barley cultivar Oplot under the forest-steppe conditions of Krasnoyarsk Krai, during 2023-2025. The crop protection programs based on chemical CPPs had a significant effect on the evaluated traits, resulting in a spring barley grain yield of 4.1 t/ha, representing an increase of 1.4 t/ha (34.1%) over the untreated control. The application of biological products resulted in grain yields of 3.6-3.7 t/ha, corresponding to yield increases of 0.9-1.0 t/ha (25-27%) over the untreated control.