Storchous I. 3. Winter wheat roots rots and soil microflora after herbicide aplication under conditions of the north-hern Forest-Steppe of Ukraine

3. The dissertation concerns with "root rot" of winter wheat and soil microflora after herbicides application. General phytopathological, microbiological and herbological methods were used. Species of "root rot" causal agents were identificated. It was shown that the disease is caused by fungi from Gaeumannomyces, Pseudocerco-sporell, Rhizoctonia, Fusarium genera. Effect of herbicides on bacterium, fungi and actinomycetes have been detected. Influence of preparates on genera of soil fungi was assessed. It was shown that herbicides dicopur, trezor and lentipur in vitro reveal fungitoxic ef-fect on "root rot" causal agents F. graminearum and G. graminis. Species of weed on winter wheat were determinated. Biological and economic efficiency of herbicides were compared. Trezor, 1,2 kg/ha was registered by Ukrstatecommission for weed control on winter wheat. In-spection its efficiency was conducted in collective agricultural enterprise "Tarasovskiy" Kyivo-Svyatoshin dis-trict Kyiv region, area - 20 ha, Net income - 72,5 hrn/ha. The results can be used in educational process of Uni-versities, agricultural enterprises of different ownership, plant protection services.