RESUMO
Plant pathogenic yeast were isolated from infected weeds that occur in cereal crops. On the basis of morphological, physiological and biochemical properties the yeast isolated from sow thistle and dandelion have been identified as Rhodosporidium diobovatum Newell & Hunter and Rhodotorula sp. In the experiment the yeast caused pathological process on the weeds, from which they are isolated, on other types of weeds, but also on wheat, oat and soybean.
Assuntos
Asteraceae/microbiologia , Produtos Agrícolas/microbiologia , Doenças das Plantas/microbiologia , Plantas Daninhas/microbiologia , Leveduras/patogenicidade , Asteraceae/crescimento & desenvolvimento , Produtos Agrícolas/crescimento & desenvolvimento , Plantas Daninhas/crescimento & desenvolvimento , Rhodotorula/isolamento & purificação , Rhodotorula/patogenicidade , Leveduras/isolamento & purificaçãoRESUMO
The symptoms of bacterial diseases of the associated weeds have been identified and described in the wheat crops grown in different farming systems. On the basis of its morphological, biochemical and serological properties the agent isolated from frost-blite, barnyard grass, wild radish, couch grass, bottle-brush, bindweed and sow thistle has been identified as Pseudomonas syringae. Serological affinity between the weed bacteria and the agent of bacterial diseases of cereals has been established.
Assuntos
Doenças das Plantas/microbiologia , Plantas Daninhas/microbiologia , Pseudomonas syringae/isolamento & purificação , Folhas de Planta/microbiologia , Sorotipagem , Triticum/crescimento & desenvolvimento , Triticum/parasitologiaRESUMO
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.
