The biological efficiency of multifunctional complexes based on <i>Bacillus subtilis</i> 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, 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; 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.