Spatial analysis of temporal changes in the pandemic of severe cassava mosaic disease in Northwestern Tanzania
To improve understanding of the dynamics of the cassava mosaic disease (CMD) pandemic front, geospatial approaches were applied to the analysis of 3 years’ data obtained from a 2-by-2° (approximately 222-by-222 km) area of northwestern Tanzania. In total, 80 farmers’ fields were assessed in each of...
| Autores principales: | , , , , , |
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| Formato: | Journal Article |
| Lenguaje: | Inglés |
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Scientific Societies
2017
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| Acceso en línea: | https://hdl.handle.net/10568/87969 |
| _version_ | 1855532777910304768 |
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| author | Szyniszewska, Anna M. Busungu, C. Boni, S.B. Shirima, R. Bouwmeester, H.J. Legg, James P. |
| author_browse | Boni, S.B. Bouwmeester, H.J. Busungu, C. Legg, James P. Shirima, R. Szyniszewska, Anna M. |
| author_facet | Szyniszewska, Anna M. Busungu, C. Boni, S.B. Shirima, R. Bouwmeester, H.J. Legg, James P. |
| author_sort | Szyniszewska, Anna M. |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | To improve understanding of the dynamics of the cassava mosaic disease (CMD) pandemic front, geospatial approaches were applied to the analysis of 3 years’ data obtained from a 2-by-2° (approximately 222-by-222 km) area of northwestern Tanzania. In total, 80 farmers’ fields were assessed in each of 2009, 2010, and 2011, with 20 evenly distributed fields per 1-by-1° quadrant. CMD-associated variables (CMD incidence, CMD severity, vector-borne CMD infection, and vector abundance) increased in magnitude from 2009 to 2010 but showed little change from 2010 to 2011. Increases occurred primarily in the two westernmost quadrants of the study area. A pandemic “front” was defined by determining the values of CMD incidence and whitefly abundance where predicted disease gradients were greatest. The pandemic-associated virus (East African cassava mosaic virus-Uganda) and vector genotype (Bemisia tabaci sub-Saharan Africa 1–subgroup 1) were both present within the area bounded by the CMD incidence front but both also occurred ahead of the front. The average speed and direction of movement of the CMD incidence front (22.9 km/year; southeast) and whitefly abundance front (46.6 km/year; southeast) were calculated, and production losses due to CMD were estimated to range from US$4.3 million to 12.2 million. |
| format | Journal Article |
| id | CGSpace87969 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2017 |
| publishDateRange | 2017 |
| publishDateSort | 2017 |
| publisher | Scientific Societies |
| publisherStr | Scientific Societies |
| record_format | dspace |
| spelling | CGSpace879692025-11-11T10:38:26Z Spatial analysis of temporal changes in the pandemic of severe cassava mosaic disease in Northwestern Tanzania Szyniszewska, Anna M. Busungu, C. Boni, S.B. Shirima, R. Bouwmeester, H.J. Legg, James P. african cassava mosaic virus diseases cassava food security pandemic spatial analysis geospatial To improve understanding of the dynamics of the cassava mosaic disease (CMD) pandemic front, geospatial approaches were applied to the analysis of 3 years’ data obtained from a 2-by-2° (approximately 222-by-222 km) area of northwestern Tanzania. In total, 80 farmers’ fields were assessed in each of 2009, 2010, and 2011, with 20 evenly distributed fields per 1-by-1° quadrant. CMD-associated variables (CMD incidence, CMD severity, vector-borne CMD infection, and vector abundance) increased in magnitude from 2009 to 2010 but showed little change from 2010 to 2011. Increases occurred primarily in the two westernmost quadrants of the study area. A pandemic “front” was defined by determining the values of CMD incidence and whitefly abundance where predicted disease gradients were greatest. The pandemic-associated virus (East African cassava mosaic virus-Uganda) and vector genotype (Bemisia tabaci sub-Saharan Africa 1–subgroup 1) were both present within the area bounded by the CMD incidence front but both also occurred ahead of the front. The average speed and direction of movement of the CMD incidence front (22.9 km/year; southeast) and whitefly abundance front (46.6 km/year; southeast) were calculated, and production losses due to CMD were estimated to range from US$4.3 million to 12.2 million. 2017-10 2017-09-20T09:12:10Z 2017-09-20T09:12:10Z Journal Article https://hdl.handle.net/10568/87969 en Open Access application/pdf Scientific Societies Szyniszewska, A.M., Busungu, C., Boni, S.B., Shirima, R.R., Bouwmeester, H. & Legg, J.P. (2017). Spatial analysis of temporal changes in the pandemic of severe cassava mosaic disease in North-Western Tanzania. Phytopathology, 107(10), 1229-1242. |
| spellingShingle | african cassava mosaic virus diseases cassava food security pandemic spatial analysis geospatial Szyniszewska, Anna M. Busungu, C. Boni, S.B. Shirima, R. Bouwmeester, H.J. Legg, James P. Spatial analysis of temporal changes in the pandemic of severe cassava mosaic disease in Northwestern Tanzania |
| title | Spatial analysis of temporal changes in the pandemic of severe cassava mosaic disease in Northwestern Tanzania |
| title_full | Spatial analysis of temporal changes in the pandemic of severe cassava mosaic disease in Northwestern Tanzania |
| title_fullStr | Spatial analysis of temporal changes in the pandemic of severe cassava mosaic disease in Northwestern Tanzania |
| title_full_unstemmed | Spatial analysis of temporal changes in the pandemic of severe cassava mosaic disease in Northwestern Tanzania |
| title_short | Spatial analysis of temporal changes in the pandemic of severe cassava mosaic disease in Northwestern Tanzania |
| title_sort | spatial analysis of temporal changes in the pandemic of severe cassava mosaic disease in northwestern tanzania |
| topic | african cassava mosaic virus diseases cassava food security pandemic spatial analysis geospatial |
| url | https://hdl.handle.net/10568/87969 |
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