[Species composition of agents of the horsetail common (Equisetum arvense L.) bacteriosises]

Bacterial diseases of weeds horsetail common (Equisetum arvense L.) were revealed in the crops of wheat and soya in the fields of Kyiv and Vinnitsia Regions of Ukraine. The distinctive symptoms of bacterial affections on the root neck, on stalks of vegetative and spore shoots, on twigs were brown, dark brown or almost black necrotic spots of oblong form. The necroses increased in size, embraced the stalks. The stalks broke, the plants dried up. Patterns of affected plants, isolated and identified phytopathogenic bacteria Pseudomonas syringae, Pectobacterium carotovorum subsp. carotovorum, Pantoea agglomerans and Curtobacterium sp. were analyzed These bacteria caused pathological process on the horsetail common, wheat and soy under the conditions of artificial inoculation. The composition of bacteria species was different in different years depending on temperature conditions of vegetative period.