The influence of pre-sowing seed treatment on the yield of winter wheat

In the cultivation of winter wheat the most sensitive factors are the possibility of freezing in winter and damage by pests during the formation of the main elements of the crop structure. The influence of pre-sowing treatment of winter wheat seeds from a complex of pests from various ecological groups on the yield of winter wheat in the forest-steppe zone of Western Siberia is considered in this article. The accumulation and degree of damage of the crop by pests was influenced by dry conditions in the autumn period during the years of the experiment. The use of modern insect-fungicide seed protectants reduced the number of wireworms by 31-58%, and the damage to the crop decreased by 45-60%. The systemic effect of the agrichemicals also ensured a reduction in the number of grain fly larvae by 49-77% toward to the control variant. The fungicide component contained in seed protectants helped reduce the prevalence of root rot in the experimental variants by an average of 15-21%, with a distribution index of 2.3 to 5%. In the control variant the prevalence of phytopathogens was 35% with a development of 13%. The studied agrichemicals showed significant biological effectiveness against a complex of pests during the autumn growing season of winter wheat in the forest-steppe conditions of Western Siberia. It made it possible to preserve plants and obtain an additional yield by 6-17% depending on the different variants of the experiment.