Geographical distribution and genetic dversity of the Banana Fusarium Wilt Fungus in Laos and Vietnam
Fusarium wilt, caused by the fungus Fusarium oxysporum f. sp. cubense (Foc), poses a major threat to global banana production. The tropical race 4 (TR4) variant of Foc is a highly virulent form with a large host range, and severely affects Cavendish bananas. Foc TR4 was recently observed within the...
| Autores principales: | , , , , , , , , , , , , , , , , |
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| Formato: | Journal Article |
| Lenguaje: | Inglés |
| Publicado: |
MDPI
2022
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| Acceso en línea: | https://hdl.handle.net/10568/117493 |
| _version_ | 1855528838130302976 |
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| author | Chittarath, Khonesavanh Nguyen, Chung Huy Bailey, Wendy C. Zheng, Si-Jun Mostert, Diane Viljoen, Altus Tazuba, Anthony Fredrick Kadama Ocimati, Walter Kearsley, Elizabeth Chi, Trần Yến Tho, Nguyen Thi Hung, Nguyen Tien Dita Rodriguez, Miguel Angel Shah, Trushar Karanja, Margaret Mahuku, George Blomme, Guy |
| author_browse | Bailey, Wendy C. Blomme, Guy Chi, Trần Yến Chittarath, Khonesavanh Dita Rodriguez, Miguel Angel Hung, Nguyen Tien Karanja, Margaret Kearsley, Elizabeth Mahuku, George Mostert, Diane Nguyen, Chung Huy Ocimati, Walter Shah, Trushar Tazuba, Anthony Fredrick Kadama Tho, Nguyen Thi Viljoen, Altus Zheng, Si-Jun |
| author_facet | Chittarath, Khonesavanh Nguyen, Chung Huy Bailey, Wendy C. Zheng, Si-Jun Mostert, Diane Viljoen, Altus Tazuba, Anthony Fredrick Kadama Ocimati, Walter Kearsley, Elizabeth Chi, Trần Yến Tho, Nguyen Thi Hung, Nguyen Tien Dita Rodriguez, Miguel Angel Shah, Trushar Karanja, Margaret Mahuku, George Blomme, Guy |
| author_sort | Chittarath, Khonesavanh |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Fusarium wilt, caused by the fungus Fusarium oxysporum f. sp. cubense (Foc), poses a major threat to global banana production. The tropical race 4 (TR4) variant of Foc is a highly virulent form with a large host range, and severely affects Cavendish bananas. Foc TR4 was recently observed within the Greater Mekong Subregion, after Chinese private companies expanded Cavendish production to the region. In this study, extensive surveys conducted across Laos and Vietnam show that Foc TR4 is still mainly constricted to the northern regions of these countries and is limited to Cavendish cultivation settings. In Laos, Foc TR4 is associated with large-scale Cavendish plantations owned by or involved with Chinese companies through which infected planting material could have been imported. In Vietnam, mostly small-holder Cavendish farmers and backyard gardens were affected by Foc TR4. In Vietnam, no direct link is found with Chinese growers, and it is expected the pathogen mainly spreads through local and regional movement of infected planting materials. Foc TR4 was not recorded on banana cultivars other than Cavendish. The extensively cultivated ‘Pisang Awak’ cultivar was solely infected by VCGs belonging to Foc race 1 and 2, with a high occurrence of VCG 0123 across Laos, and of VCG 0124/5 in Vietnam. Substantial diversity of Foc VCGs was recorded (VCGs 0123, 0124/5, 01218 and 01221) from northern to southern regions in both countries, suggesting that Fusarium wilt is well established in the region. Interviews with farmers indicated that the local knowledge of Fusarium wilt epidemiology and options for disease management was limited. Clear communication efforts on disease epidemiology and management with emphasis on biosecurity practices need to be improved in order to prevent further spread of Foc TR4 to mixed variety smallholder settings. |
| format | Journal Article |
| id | CGSpace117493 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2022 |
| publishDateRange | 2022 |
| publishDateSort | 2022 |
| publisher | MDPI |
| publisherStr | MDPI |
| record_format | dspace |
| spelling | CGSpace1174932025-12-08T10:29:22Z Geographical distribution and genetic dversity of the Banana Fusarium Wilt Fungus in Laos and Vietnam Chittarath, Khonesavanh Nguyen, Chung Huy Bailey, Wendy C. Zheng, Si-Jun Mostert, Diane Viljoen, Altus Tazuba, Anthony Fredrick Kadama Ocimati, Walter Kearsley, Elizabeth Chi, Trần Yến Tho, Nguyen Thi Hung, Nguyen Tien Dita Rodriguez, Miguel Angel Shah, Trushar Karanja, Margaret Mahuku, George Blomme, Guy surveys geographical distribution plant diseases control methods encuestas distribución geográfica enfermedades de las plantas fusarium bananas smallholders genetic variation Fusarium wilt, caused by the fungus Fusarium oxysporum f. sp. cubense (Foc), poses a major threat to global banana production. The tropical race 4 (TR4) variant of Foc is a highly virulent form with a large host range, and severely affects Cavendish bananas. Foc TR4 was recently observed within the Greater Mekong Subregion, after Chinese private companies expanded Cavendish production to the region. In this study, extensive surveys conducted across Laos and Vietnam show that Foc TR4 is still mainly constricted to the northern regions of these countries and is limited to Cavendish cultivation settings. In Laos, Foc TR4 is associated with large-scale Cavendish plantations owned by or involved with Chinese companies through which infected planting material could have been imported. In Vietnam, mostly small-holder Cavendish farmers and backyard gardens were affected by Foc TR4. In Vietnam, no direct link is found with Chinese growers, and it is expected the pathogen mainly spreads through local and regional movement of infected planting materials. Foc TR4 was not recorded on banana cultivars other than Cavendish. The extensively cultivated ‘Pisang Awak’ cultivar was solely infected by VCGs belonging to Foc race 1 and 2, with a high occurrence of VCG 0123 across Laos, and of VCG 0124/5 in Vietnam. Substantial diversity of Foc VCGs was recorded (VCGs 0123, 0124/5, 01218 and 01221) from northern to southern regions in both countries, suggesting that Fusarium wilt is well established in the region. Interviews with farmers indicated that the local knowledge of Fusarium wilt epidemiology and options for disease management was limited. Clear communication efforts on disease epidemiology and management with emphasis on biosecurity practices need to be improved in order to prevent further spread of Foc TR4 to mixed variety smallholder settings. 2022 2022-01-13T11:52:42Z 2022-01-13T11:52:42Z Journal Article https://hdl.handle.net/10568/117493 en Open Access application/pdf MDPI Chittarath, K., Nguyen, C. H., Bailey, W. C., Zheng, S.-J., Mostert, D., Viljoen, A., Tazuba, A. F., Ocimati, W., Kearsley, E., Chi, T. Y., Tho, N. T., Hung, N. T., Dita, M., Shah, T., Karanja, M., Mahuku, G., & Blomme, G. (2022). Geographical Distribution and Genetic Diversity of the Banana Fusarium Wilt Fungus in Laos and Vietnam. In Journal of Fungi (Vol. 8, Issue 1, p. 46). MDPI AG. https://doi.org/10.3390/jof8010046 |
| spellingShingle | surveys geographical distribution plant diseases control methods encuestas distribución geográfica enfermedades de las plantas fusarium bananas smallholders genetic variation Chittarath, Khonesavanh Nguyen, Chung Huy Bailey, Wendy C. Zheng, Si-Jun Mostert, Diane Viljoen, Altus Tazuba, Anthony Fredrick Kadama Ocimati, Walter Kearsley, Elizabeth Chi, Trần Yến Tho, Nguyen Thi Hung, Nguyen Tien Dita Rodriguez, Miguel Angel Shah, Trushar Karanja, Margaret Mahuku, George Blomme, Guy Geographical distribution and genetic dversity of the Banana Fusarium Wilt Fungus in Laos and Vietnam |
| title | Geographical distribution and genetic dversity of the Banana Fusarium Wilt Fungus in Laos and Vietnam |
| title_full | Geographical distribution and genetic dversity of the Banana Fusarium Wilt Fungus in Laos and Vietnam |
| title_fullStr | Geographical distribution and genetic dversity of the Banana Fusarium Wilt Fungus in Laos and Vietnam |
| title_full_unstemmed | Geographical distribution and genetic dversity of the Banana Fusarium Wilt Fungus in Laos and Vietnam |
| title_short | Geographical distribution and genetic dversity of the Banana Fusarium Wilt Fungus in Laos and Vietnam |
| title_sort | geographical distribution and genetic dversity of the banana fusarium wilt fungus in laos and vietnam |
| topic | surveys geographical distribution plant diseases control methods encuestas distribución geográfica enfermedades de las plantas fusarium bananas smallholders genetic variation |
| url | https://hdl.handle.net/10568/117493 |
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