Biological control of fire blight in pear orchards with a formulation of Pantoea agglomerans strain Eh 24

Brazilian Journal of Microbiology

Hatice Özaktan¹  Tayyar Bora¹ 

[1] ,University of Ege Faculty of Agriculture Department of Plant Protection,Turkey

关键词: biological control;    fire blight;    antagonistic bacteria;    Pantoea agglomerans (Erwinia herbicola);    Erwinia amylovora;    controle biológico;    fire blight;    bactérias antagonistas;    Pantoea agglomerans;    Erwinia amylovora;   

DOI  :  10.1590/S1517-83822004000200010

来源: SciELO

【 摘 要 】

Biological control by using epiphytic bacteria against Erwinia amylovora has been considered as an alternative method for controlling the disease. Talc-based formulation of Pantoea agglomerans strain Eh-24 was applied at 30% and 100% bloom on two pear orchards which were selected from different locations in the Aegean Region in Turkey. Pear orchard trials were replicated for two years (1999 and 2000) in each place. Talc-based formulation of P. agglomerans strain Eh-24 was sprayed on pear trees which were naturally infected with E. amylovora. In the orchard trials conducted in 1999 and 2000, talc-based formulation of P. agglomerans strain Eh-24 reduced the percentage of blighted blossoms on pear orchards by 63% to 76%, approximately. Copper oxychloride+maneb was less effective in reducing the incidence of blossom infection by E. amylovora in each pear orchard than the bioformulation treatment. P. agglomerans strain Eh-24 labelled with StrR+ was applied at 30% and 100% bloom to monitor the colonization and population dynamics of P. agglomerans on pear blossoms. The population size of P. agglomerans strain Eh-24 strR+ on pear blossoms increased from 2x10(4) to 1.3x10(6) cfu per blossom over 18 days.

【 授权许可】

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