The Influence of Chitosan Preparations on Spring Bread Wheat Development and Resistance to Diseases Caused by Biotrophic and Hemibiotrophic Fungi under Epidemic Conditions

A comparative study of the effect of linear chitosan (Сh) and the globular form of chitosan, novochizol (Nc), on the growth and development of spring bread wheat, as well as protection against a complex of fungal diseases under epidemic conditions, was carried out. The indicators “Area Under the Disease Progress Curve” (AUDPC) and “Resistance Index” (RI) were calculated based on the observations. The research results showed that the Ch had greater growth-stimulating activity (on seed germination, stem and ear formation, and seed setting) and a protective effect against biotrophic and hemibiotrophic pathogens than Nc. The Nc–SA preparation (complex with 0.01