Interactions of Colletotrichum musae and Lasiodiplodia theobromae and their biocontrol by Pantoea agglomerans and Flavobacterium sp. in expression of crown rot of 'Embul' banana

Article


Gunasinghe, W. K. R. Niroshini and Karunaratne, Anjani M.. 2009. "Interactions of Colletotrichum musae and Lasiodiplodia theobromae and their biocontrol by Pantoea agglomerans and Flavobacterium sp. in expression of crown rot of 'Embul' banana." BioControl: journal of the International Organisation for Biological Control. 54 (4), pp. 587-596. https://doi.org/10.1007/s10526-009-9210-4
Article Title

Interactions of Colletotrichum musae and Lasiodiplodia
theobromae and their biocontrol by Pantoea agglomerans
and Flavobacterium sp. in expression of crown rot of 'Embul' banana

ERA Journal ID2876
Article CategoryArticle
AuthorsGunasinghe, W. K. R. Niroshini (Author) and Karunaratne, Anjani M. (Author)
Journal TitleBioControl: journal of the International Organisation for Biological Control
Journal Citation54 (4), pp. 587-596
Number of Pages10
Year2009
Place of PublicationNetherlands
ISSN0013-8959
1386-6141
1573-8248
Digital Object Identifier (DOI)https://doi.org/10.1007/s10526-009-9210-4
Web Address (URL)https://link.springer.com/article/10.1007%2Fs10526-009-9210-4
Abstract

Previous research has shown that two local isolates of bacteria (Pantoea agglomerans and Flavobacterium sp.) are capable of biocontrol of the two main pathogens (Colletotrichum musae and Lasiodiplodia theobromae) known to cause crown rot on ‘‘Embul’’ (Musa, AAB) banana. In this investigation an attempt was made to elucidate the comparative virulence of these pathogens and to determine the underlying biocontrol mechanisms. L. theobromae was more virulent, causing faster spread of the disease, whereas C. musae was more resistant to the bacterial antagonists. Viable cells of the antagonists were more effective at suppressing conidial germination than cell-free culture media. It seemed that antifungal compounds acting on conidial germination may be heat stable and those acting on mycelia may include heat labile compounds also. Considering the specialized roles observed for each pathogen in terms of causing the disease, and in modes of control by antagonists, future field investigations on biocontrol should consider the roles played by the pathogens and the antagonists.

KeywordsAntagonism; Antibiotic compounds; Mode of action
ANZSRC Field of Research 2020310805. Plant pathology
Byline AffiliationsUniversity of Peradeniya, Sri Lanka
Institution of OriginUniversity of Southern Queensland
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