Kulbanska I. Fraxinus excelsior L. pathology in forest plantations of Western Podillya of Ukraine.

Target of research - abiotic and biotic factors, including parasitic ones in Fraxinus excelsior L. pathology in plantations of Western Podillya of Ukraine. Goal - to identify adverse abiotic and biotic factors, including parasitic ones of Fraxinus excelsior L. pathology in forest stands of Western Podillya of Ukraine. Research methods - methods of forest-pathological studies; microbiological, mycological and phytopathological; entomological, silvicultural and ecological, silvicultural and forest mensuration methods. Scientific novelty. On the basis of comprehensive studies of abiotic and biotic factors of Fraxinus excelsior L. pathology in Western Podillya plantations the species composition of European ash pathogenic myco- and microbiota was firstly identified, in particular seven bacterial species and 10 species of micromycetes were marked out. Laws of development of European ash pathology in stands with various silvicultural and forest mensuration characteristics were determined, due to meteorological factors the role and place of insects-carpophagous as a vector in bacterioses extension were substantiated. Etiology and pathogenesis of European ash tuberculosis were studied, five phases of disease progression - scab - expansion - true tuberculosis - deformation of generative organs - flaws in wood were identified. Theoretical and practical approaches to the prevention and control of causative agents of forest infectious diseases particularly bacterioses were processed. It was found that a limiting factor of phytopathogenic bacteria was spore-forming bacteria Bacillus sp. Practical importance. The main theoretical and applied results obtained in the process of conducting research in the stands with the participation of Fraxinus excelsior are recommended for implementation at the agricultural enterprises of Ukraine. In particular they are used at SE "Chortkivs'ke forestry" for stands' phytopathological inspection and at SO "Ukrainian FSC" during phytopathological seed analyzes of forest arboraceous and shrubs plants. Separate parts of the thesis and processed guidelines for diagnostics of infectious diseases agents, the role and place of harmful insects in the accumulation, preservation and dissemination of infection combined with meteorological and silvicultural and forest mensuration characteristics are proposed to use in educational process in teaching subjects "Forest Phytopathology", "Forest Entomology", "Forestry" for the students of forestry profile. Application area: forestry.