ETIOLOGY AND SYMPTOMATOLOGY OF BACTERIOSES OF WOOD PLANTS IN THE STANDS OF THE GREEN ZONE OF THE CITY OF KIEV

Abstract

The results of studies of bacterioses Fraxinus excelsior, Betula pendula, Aesculus hippocastanum, Quercus robur, Pinus sylvestris, Populus alba, Populus tremula, Morus alba, Ailanthus altíssimaare presented. The focus is on that, phytopathogenic bacteria are extremely harmful and directly involved in the epiphytotic dieback of woody plants. To study the symptoms and etiology of bacterial diseases of woody plants in the green zone of the city of Kiev, special methods of forest pathological examinations and phytopathological studies were used, as well as methods generally accepted in experimental microbiology, in particular the selection of affected organs and tissues, isolation of micro- and microorganisms into a pure culture; checking the pathogenic properties of isolated isolates and their identification and the like. It is shown that pathogens of bacterioses of the studied plants are phytopathogenic bacteria-polybiotroph from genus Pseudomonas, Xanthomonas, Enterobacter, Erwinia, Brenneria, Xylella, Rhizobium, Corynebacterium, Bacillus, Clostridiumetc. Symptoms and features of the pathogenesis of ash tuberculosis are given (causative agent – Pseudomonas syringae pv. savastanoi); bacterial dropsy of white birch (causative agent – Lelliottia nimipressuralis), common horse chestnut (causative agent – Pseudomonas syringae var. aesculi), common oak (causative agent – Lelliottia nimipressuralis), white poplar and aspen (bacterial association, in particular Erwinia cancerogena, Corynebacterium humiferum, Bacillus populi), white mulberry (causative agent – Pseudomonas syringae pv. mori), ailanthus, (pathogen not identified); and tumor-associated bacteriosis in pine (causative agent is not identified). The need to deepen studies of pathogenic components of automicrobiota, in particular in the context of understanding both the general biological problems of pathology and the goal of developing forest protection measures, is noted.

Keywords

• bacterial diseases
• phytopathogenic bacteria
• etiology
• symptomatology
• pathogenesis