Savenko O. The agents of bacterioses of segetal vegetation wheat agrophytocenosis.

It has been found that weeds in wheat agrophytocenoses both intensive and organic farming systems is the ecological niche for plant pathogenic bacteria: Pseudomonas syringae, Pseudomonas sp., P.fluorescens, Pectobacterium carotovorum, Pantoea agglomerans and Xanthomonas translucens, which causes diseases of cereals. On the weeds it was also found P. viridiflava and yeast Rhodosporidium diobovatum and Rhodotorula sp., which are not typical for wheat. Isolated pathogens are closely related to agent bacterial diseases of wheat according to studied biochemical, hemotaxonomic, serological and genetic properties. Most of phytopathogens isolated from weeds are wide specialized; they can affect various types of segetal vegetation and cereals. There was shown a possibility of existence in nature highly aggressive of P. syringae strains for weeds, which not affect wheat. Selected strains can damage several species of perennial weeds, making them promising for the development of biological preparations for removal of weeds in crops of wheat. High antagonistic activity of Bacillus sp. 113 against weed infecting strains of P. syringae and P. viridiflava has been discovered. Therefore, this strain can be used to develop biological crop protection from agents of bacterial diseases. Keywords: segetal vegetation, agents of bacterial diseases, ecological niche, cereals.