Dzham O. Development of spring barley root rors after herbicide application in northen Forest-Steppe of Ukraine

Object of investigation - spring barley root rots and rhizosphere microflora of soil. Goal of investigation - investigation of effect of herbicides on development of spring barley root rots in northern Forest-Steppe of Ukraine and agroecosystem components which control development of this disease. Methods of investigation and equipment - general scientific methods, which are used for investigation of phytopathological objects. Species composition of spring barley root rots pathogens and rhizosphere microflora of soil were determined with microscope "Nikon". Theoretical results and novelty - for the first time for Ukraine microflora of spring barley rhizosphere, its dynamics were investigated, species composition of soil mycoflora after herbicide application was verified. Practical results and novelty - development and species composition of spring barley root rots were investigated. Efficient herbicides for control of dicots in spring barley were recommended. Object and extent of introduction - herbic ides Tresor and Dikopur F were brought to "List of pesticides and agrochemicals allowed for use in Ukraine". Farm test was carried out at farm "Baryshevskoe", Baryshevsky district, Kiev region on area of 50 ha. Introduction efficiency - biological efficiency - 94,8%, farm efficiency - 5,2 c/ha. Sphere of use - in learning process at high school, at agricultural farms.