Phytopathogenic Bacteria Associated with Bacterioses of Common Oak (Quercus robur L.) in Ukraine

Studying the biological characteristics of causative agents bacteriosis common oak (Quercus robur L.) (to highlight links between key factors pathogenesis and bacterial groups) is a new relevant area research. This work aims to identify species composition phytopathogenic bacteria associated with study morphological, cultural, biochemical properties pathogens. To establish general phytosanitary state surveyed stands, classical forest inventory phytopathological (visual on based typical symptoms disease macroscopic) methods were used. The isolated studied using microbiological methods. weakening dieback in forests Ukraine directly related four types bacterioses their pathogens: soft rot acorns (Pectobacterium carotovorum subsp. carotovorum, wetwood (Lelliottia nimipressuralis), dry branches trunks (Erwinia rhapontici), canker (Pseudomonas fluorescens Pseudomonas sp.). Research correspondence pathogens has established that synthesis pectin-degrading enzymes ability ferment release acid gas many carbohydrate media by main characteristic. ensures intensity particular bacteriosis.