PHYTOSANITARY CONDITION OF SPRING BARLEY CROPS UNDER THE INFLUENCE OF MICROBIAL PREPARATION MICROHUMIN AND DIFFERENT FERTILIZING SYSTEMS

The study of different fertilizing systems and microbial preparation Microhumin on the phytosanitary condition of spring barley crops of Hosya variety was performed in the stationary field experiment with short crop rotation (potato – barley – pea – winter wheat) on the leached black soil. Dispersion and development of root rots and rhynchosporium infection, as well as powdery mildew and dark brown blotch was investigated. The decrease in expansion of root rots and rhynchosporium infection on leaves of spring barley was observed in variants with organic fertilizers. The reduction of incidence was observed in variants with mineral fertilizers, especially at medium doses of fertilizers (N60P60K60). Microbial preparation Microhumin had contributed to the improvement of phytosanitary condition of spring barley crops at the combined use with organic and mineral fertilizers.