Root rot of spring wheat in the Transurals and measures against them
Agricultural use of the Transural soil radically alters their key properties including the level of biological activity. Already in the 60s of the last century, numerous dynamically developed aggressive populations of pathogens of common root and Fusarium rot were formed in the soils of the Kurgan region. According to the results of our research, the infection potential of root rot Bipolaris sorokiniana pathogen in the soil reached 2.2-14.5 TH. During minimizing in processing, the main part of the conidia was concentrated in the upper soil layer. Wet conditions of vegetation contributed to the proliferation of plant pathogens and their transfer to the seeds. Root rots have complex etiology, and pathogenic complex in a seedling phase could include Helminthosporium sativum, species of the genera Fusarium (F.avenaceum, F.oxysporum, F.sporotrichoides, F.poae et al.), Pythium, Ophiobolus, Rhizoctonia and others. The significant development of root infections in the soils of the Kurgan region is caused by a high saturation of crop rotations with crops receptive to them and increasing the potential of pathogens. One of the main factors in preservation and spread of spring wheat disease is the seeds. In modern conditions of spring wheat cultivation, it is necessary to optimize the protective measures for improving the quality of seeds. One of the most effective methods of seed presowing preparation is seed treatment