Cassava mosaic disease: incidence and yield performance of cassava cultivars in Zambia
Cassava is the main food crop for an estimated 30% of the population in Zambia where yields of 5.8 t/ha are some of the lowest of any major cassava-producing country. A study was conducted to characterize yield responses of Zambian cassava genotypes to cassava mosaic disease (CMD), as well as the re...
| Autores principales: | , , , , |
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| Formato: | Journal Article |
| Lenguaje: | Inglés |
| Publicado: |
Springer
2017
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| Materias: | |
| Acceso en línea: | https://hdl.handle.net/10568/89937 |
| _version_ | 1855526398226071552 |
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| author | Tembo, M. Mataa, M. Legg, James P. Chikoti, Patrick Chiza Ntawuruhunga, Pheneas |
| author_browse | Chikoti, Patrick Chiza Legg, James P. Mataa, M. Ntawuruhunga, Pheneas Tembo, M. |
| author_facet | Tembo, M. Mataa, M. Legg, James P. Chikoti, Patrick Chiza Ntawuruhunga, Pheneas |
| author_sort | Tembo, M. |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Cassava is the main food crop for an estimated 30% of the population in Zambia where yields of 5.8 t/ha are some of the lowest of any major cassava-producing country. A study was conducted to characterize yield responses of Zambian cassava genotypes to cassava mosaic disease (CMD), as well as the relative susceptibilities to the causal viruses. CMD-free planting material of four improved cultivars (Mweru, Chila, Tanganyika and Kampolombo), four officially-promoted landraces (Nalumino, Kapumba, Bangweulu and Katobamphunta) and a locally popular landrace (Manyopola) were evaluated at a field site in Rufunsa District, Lusaka Province (central-eastern Zambia). Manyopola and Bangweulu were found to be susceptible and had high foliar incidences of CMD (97.5% and 74.7%, respectively) based on visual CMD symptoms with high severity scores (3.5, 3.5), whilst cv. Kampolombo was resistant (incidence 0.7%, severity 2.0). Mweru had the highest root yield (17.6 t ha-1 ) while Kapumba, the second most susceptible cultivar, had the lowest root yield (3.2 t ha-1 ). Significant inverse regression 2 relationships were demonstrated between CMD incidence and CMD severity with root yield. Using these regressions together with published data on cassava production and countrywide CMD incidence in Zambia, it was possible to estimate annual losses due to CMD at ca. US$ 51.7 million. Evidence for resistance to CMD amongst several of the improved cassava cultivars tested suggests that there is great potential for the effective control and management of CMD in Zambia, if these materials could be widely disseminated. |
| format | Journal Article |
| id | CGSpace89937 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2017 |
| publishDateRange | 2017 |
| publishDateSort | 2017 |
| publisher | Springer |
| publisherStr | Springer |
| record_format | dspace |
| spelling | CGSpace899372025-12-08T10:29:22Z Cassava mosaic disease: incidence and yield performance of cassava cultivars in Zambia Tembo, M. Mataa, M. Legg, James P. Chikoti, Patrick Chiza Ntawuruhunga, Pheneas cassava resistance diseases Cassava is the main food crop for an estimated 30% of the population in Zambia where yields of 5.8 t/ha are some of the lowest of any major cassava-producing country. A study was conducted to characterize yield responses of Zambian cassava genotypes to cassava mosaic disease (CMD), as well as the relative susceptibilities to the causal viruses. CMD-free planting material of four improved cultivars (Mweru, Chila, Tanganyika and Kampolombo), four officially-promoted landraces (Nalumino, Kapumba, Bangweulu and Katobamphunta) and a locally popular landrace (Manyopola) were evaluated at a field site in Rufunsa District, Lusaka Province (central-eastern Zambia). Manyopola and Bangweulu were found to be susceptible and had high foliar incidences of CMD (97.5% and 74.7%, respectively) based on visual CMD symptoms with high severity scores (3.5, 3.5), whilst cv. Kampolombo was resistant (incidence 0.7%, severity 2.0). Mweru had the highest root yield (17.6 t ha-1 ) while Kapumba, the second most susceptible cultivar, had the lowest root yield (3.2 t ha-1 ). Significant inverse regression 2 relationships were demonstrated between CMD incidence and CMD severity with root yield. Using these regressions together with published data on cassava production and countrywide CMD incidence in Zambia, it was possible to estimate annual losses due to CMD at ca. US$ 51.7 million. Evidence for resistance to CMD amongst several of the improved cassava cultivars tested suggests that there is great potential for the effective control and management of CMD in Zambia, if these materials could be widely disseminated. 2017 2018-01-08T10:15:06Z 2018-01-08T10:15:06Z Journal Article https://hdl.handle.net/10568/89937 en Open Access application/pdf Springer Tembo, M., Mataa, M., Legg, J., Chikoti, P. C. & Ntawuruhunga, P. (2017). Cassava mosaic disease: incidence and yield performance of cassava cultivars in Zambia. Journal of Plant Pathology, 99(3), 1-28. |
| spellingShingle | cassava resistance diseases Tembo, M. Mataa, M. Legg, James P. Chikoti, Patrick Chiza Ntawuruhunga, Pheneas Cassava mosaic disease: incidence and yield performance of cassava cultivars in Zambia |
| title | Cassava mosaic disease: incidence and yield performance of cassava cultivars in Zambia |
| title_full | Cassava mosaic disease: incidence and yield performance of cassava cultivars in Zambia |
| title_fullStr | Cassava mosaic disease: incidence and yield performance of cassava cultivars in Zambia |
| title_full_unstemmed | Cassava mosaic disease: incidence and yield performance of cassava cultivars in Zambia |
| title_short | Cassava mosaic disease: incidence and yield performance of cassava cultivars in Zambia |
| title_sort | cassava mosaic disease incidence and yield performance of cassava cultivars in zambia |
| topic | cassava resistance diseases |
| url | https://hdl.handle.net/10568/89937 |
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