Interactions between Erwinia amylovora and E. herbicola
The interactions of Erwinia herbicola, an effective biocontrol agent of fire blight on hawthorn, and E. amylovora (EPPO A2 organism) on the stigma of hawthorn blossoms was investigated in the United Kingdom.
It was found that E. herbicola occupied a similar ecological niche on the hawthorn stigma, colonized the same physical sites and competed for the same growth-limiting resource. The competitive advantage of E. herbicola was partly attributed by the authors to a possible production of antibiotic substances by the biocontrol agent.
Sources
Wilson, M.; Epton, H.A.S.; Sigee, D.C. (1992)
Interactions between Erwinia herbicola and E. amylovora on the stigma of hawthorn blossoms.
Phytopathology 82, 914-918.