EFFICIENCY OF SPRING BARLEY SEED PRE-SOWING TREATMENT WITH FUNGICIDES

Abstract

The paper shows the effect of fungicide seed pre-treatment on the productivity and infestibility of spring barley root rot which is seen as the most common and harmful disease in the Kurgan region. The authors highlight the hydrothermal conditions were favorable for spring barley cultivation within the experimental period. The hydrothermal coefficient of summer months of the vegetation period in 2017 was 1.03; 2018 - 0.89, and in 2019 - 0.95. The researchers found out that the disease progress index depended on hydrothermal conditions of the vegetation period, and was reduced by means of favorable regime of moisture, root rot development. The regression equation is as follows: y = 108.7-90.9x. The researchers observed lower disease progress, with the most effective root rot suppressed by Scarlet and Polaris specimens (the disease progress index decreased to 9.6-13.1%). At pre-sowing treatment of seeds there was The impact of seedbed preparation on the disease progress index was 37.4%. When treating seeds with specimens, spring barley yield increased by 9.3-17.3%. Spring barley productivity increased under favorable hydrothermal conditions, the effect of this factor was 23,8%, and the effect of pre-sowing treatment of seeds was 55,5%. During the research period the spring barley yield decreased while root rot infestation increased; the regression equation is as follows: y = 28.36 - 0.49x. To reduce the infestation of root rot and increase the productivity of spring barley, the paper suggests to apply pre-sowing disinfection of seeds with specimens Scarlet (rate of consumption of 0.4 l/t) and Polaris (rate of consumption of 1.5 l/t), while the disease progress rate reduced and yield increases by 13.2-17.3%.