Shvets' M. Bacterial dropsy Betula pendula Roth. in the Zhytomyr Polissya of Ukraine (etiology, symptomatic, pathogenesis).

The object of the study - birch and its phytosanitary condition in the stands of Zhytomyr Polissya. The aim - is to systematically study the symptoms, etiology and pathogenesis bacterial dropsy of the Betula pendula in the stands of the Zhytomyr Polissya of Ukraine. Research methods - are general scientific, forestry-pathological, microbiological, mycological, phytopathological, entomological, forestry and ecological. Scientific novelty - the influence of abiotic (as catalysts) and biotic factors in the pathology of the Betula pendula bacteria in the stands of Zhytomyr Polissya of Ukraine is substantiated; the etiology of bacteriosis, symptoms and pathogenesis have been investigated; revealed the variable pathogenic properties of Pantoea agglomerans and Xanthomonas campestris on B. pendula; found that leaves and young birch branches are resistant to bacterial infection; the systemic relationships of bacterial dropsy of myco- and microorganisms are investigated; the role and place of the entomofauna as a vector in the propagation of bacterial dropsy and associated myco- and microorganisms is experimentally grounded. Practical use - the results are the basis for developing measures on the diagnosis, symptoms, etiology and pathogenesis of bacterial dropsy B. pendula in the stands of Zhytomyr Polissya, for monitoring of the phytosanitary state of forest plantations, during planning and conducting of care and sanitary felling, and also in the educational process. Field of use: forestry.