The Biological Efficiencies of Multifunctional Complexes Based on Bacillus subtilis Strains and Chitosan Salicylate in Wheat Cultivation

The influence of multifunctional complexes capable of causing a growth-stimulating effect on plants and inhibiting the development of a wide range of diseases on the Leningradka 6 spring soft wheat cultivar (k-64900) was investigated. In the research, it was found that the application of multifunctional complexes based on the Bacillus subtilis bacterial strains and 0.1% chitosan salicylate in wheat cultivation led to a significant decrease in the incidence of plant diseases: yellow and brown rust, powdery mildew, and root rot and caused an increase in morphometric productivity indicators. This tendency was associated with a significant influence of multifunctional complexes on the increase in the number of primary and nodal roots, the length of nodal roots, productive bushiness, the number of spikelets per spike, and the grains weight per spike. However, the effectiveness of protective and stimulating wheat treatments depended on the complex of natural and climatic factors of wheat vegetation seasons.