Kurdyukova O. The phytobiological characteristic of ruderal synusias and methods for controlling ruderal synusias in the agrophytocenosises of the Left-Bank Steppe Zone of Ukraine

In this thesis work is theoretically grounded and improved the system of the species and quantitative composition, becoming, extension and mass of the weeds monitoring at different processing systems in different steppe zones of Ukraine, created the concept of ecological coenotic strategy of the weed synusia existence and their morphological and biological polymorphism in process of adaptation to the phytogenic medium. Is established a range of biological characteristic properties, modification of mutation, seasonal dynamics and fluctuations of the weed synusia and the weeds population state. Is determined the weeds exuberance pattern in different conditions of growth and development in the segetal and ruderal ecotopes, and level of hazards depending on populations age states and their growth duration in seeds. Is revealed the role of the soil base cultivation in reduction of the plants actual and potential crowding at the seven-course field rotation. It is proved experimentally and developed recommendations for integrated control of the segetal weed synusia and of the some weeds species in the modern cropping systems and technologies of the crops cultivation, are implemented the projects of the seeds protection against weeds with the average annual economic effect of UAH 11,2-12,8 mln.