Expansion of the cassava brown streak disease epidemic in eastern Democratic Republic of Congo
Cassava plays a key role in ensuring food security and generating income for smallholder farmers throughout Central Africa, particularly in the Democratic Republic of Congo (DRC). This status is threatened, however, by cassava brown streak disease (CBSD), which has expanded its incidence and range i...
| Main Authors: | , , , , , , , , , , , , |
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| Format: | Journal Article |
| Language: | Inglés |
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Scientific Societies
2021
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10568/116933 |
| _version_ | 1855542248165343232 |
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| author | Casinga, C.M. Shirima, R.R. Mahungu, N. Tata-Hangy, W. Bashizi, K.B. Munyerenkana, C.M. Ughento, H. Enene, J. Sikirou, M. Dhed'a, D.B. Monde, G. Kumar, P. Lava Legg, James P. |
| author_browse | Bashizi, K.B. Casinga, C.M. Dhed'a, D.B. Enene, J. Kumar, P. Lava Legg, James P. Mahungu, N. Monde, G. Munyerenkana, C.M. Shirima, R.R. Sikirou, M. Tata-Hangy, W. Ughento, H. |
| author_facet | Casinga, C.M. Shirima, R.R. Mahungu, N. Tata-Hangy, W. Bashizi, K.B. Munyerenkana, C.M. Ughento, H. Enene, J. Sikirou, M. Dhed'a, D.B. Monde, G. Kumar, P. Lava Legg, James P. |
| author_sort | Casinga, C.M. |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Cassava plays a key role in ensuring food security and generating income for smallholder farmers throughout Central Africa, particularly in the Democratic Republic of Congo (DRC). This status is threatened, however, by cassava brown streak disease (CBSD), which has expanded its incidence and range in eastern DRC. The study described here comprises the first extensive assessment of temporal change in the occurrence of CBSD and its causal viruses in DRC, based on surveys conducted during 2016 and 2018. Cassava fields were inspected in Ituri, Nord-Kivu, Sud-Kivu, Tanganyika, and Haut-Katanga provinces within eastern DRC to record foliar incidence and severity of CBSD. Leaf samples were collected for virus detection and species-level identification. New occurrences of CBSD, confirmed by virus diagnostic tests, were recorded in two provinces (Haut-Katanga and Sud-Kivu) and nine previously unaffected territories, covering an area of >62,000 km2, and at up to 900 km from locations of previously published reports of CBSD in DRC. Overall, average CBSD incidence within fields was 13.2% in 2016 and 16.1% in 2018. In the new spread zone of Haut-Katanga, incidence increased from 1.7 to 15.9%. CBSD is now present in provinces covering 321,000 km2, which is approximately 14% of the total area of DRC. This represents a major expansion of the CBSD epidemic, which was only recorded from one province (Nord-Kivu) in 2012. Both Cassava brown streak virus (CBSV) and Ugandan cassava brown streak virus were detected in Ituri, Nord-Kivu, and Sud-Kivu, but only CBSV was detected in Haut-Katanga. Overall, these results confirm the increasing threat that CBSD poses to cassava production in DRC and describe an important expansion in the African pandemic of CBSD. |
| format | Journal Article |
| id | CGSpace116933 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2021 |
| publishDateRange | 2021 |
| publishDateSort | 2021 |
| publisher | Scientific Societies |
| publisherStr | Scientific Societies |
| record_format | dspace |
| spelling | CGSpace1169332025-12-08T09:54:28Z Expansion of the cassava brown streak disease epidemic in eastern Democratic Republic of Congo Casinga, C.M. Shirima, R.R. Mahungu, N. Tata-Hangy, W. Bashizi, K.B. Munyerenkana, C.M. Ughento, H. Enene, J. Sikirou, M. Dhed'a, D.B. Monde, G. Kumar, P. Lava Legg, James P. cassava food security smallholders farmers plant diseases democratic republic of the congo Cassava plays a key role in ensuring food security and generating income for smallholder farmers throughout Central Africa, particularly in the Democratic Republic of Congo (DRC). This status is threatened, however, by cassava brown streak disease (CBSD), which has expanded its incidence and range in eastern DRC. The study described here comprises the first extensive assessment of temporal change in the occurrence of CBSD and its causal viruses in DRC, based on surveys conducted during 2016 and 2018. Cassava fields were inspected in Ituri, Nord-Kivu, Sud-Kivu, Tanganyika, and Haut-Katanga provinces within eastern DRC to record foliar incidence and severity of CBSD. Leaf samples were collected for virus detection and species-level identification. New occurrences of CBSD, confirmed by virus diagnostic tests, were recorded in two provinces (Haut-Katanga and Sud-Kivu) and nine previously unaffected territories, covering an area of >62,000 km2, and at up to 900 km from locations of previously published reports of CBSD in DRC. Overall, average CBSD incidence within fields was 13.2% in 2016 and 16.1% in 2018. In the new spread zone of Haut-Katanga, incidence increased from 1.7 to 15.9%. CBSD is now present in provinces covering 321,000 km2, which is approximately 14% of the total area of DRC. This represents a major expansion of the CBSD epidemic, which was only recorded from one province (Nord-Kivu) in 2012. Both Cassava brown streak virus (CBSV) and Ugandan cassava brown streak virus were detected in Ituri, Nord-Kivu, and Sud-Kivu, but only CBSV was detected in Haut-Katanga. Overall, these results confirm the increasing threat that CBSD poses to cassava production in DRC and describe an important expansion in the African pandemic of CBSD. 2021-08-01 2021-12-21T11:01:55Z 2021-12-21T11:01:55Z Journal Article https://hdl.handle.net/10568/116933 en Open Access Scientific Societies Casinga, C.M., Shirima, R.R., Mahungu, N., Tata-Hangy, W., Bashizi, K.B., Munyerenkana, C.M., ... & Legg, J.P. (2021). Expansion of the cassava brown streak disease epidemic in eastern Democratic Republic of Congo. Plant Disease, 105(8), 2177-2188. |
| spellingShingle | cassava food security smallholders farmers plant diseases democratic republic of the congo Casinga, C.M. Shirima, R.R. Mahungu, N. Tata-Hangy, W. Bashizi, K.B. Munyerenkana, C.M. Ughento, H. Enene, J. Sikirou, M. Dhed'a, D.B. Monde, G. Kumar, P. Lava Legg, James P. Expansion of the cassava brown streak disease epidemic in eastern Democratic Republic of Congo |
| title | Expansion of the cassava brown streak disease epidemic in eastern Democratic Republic of Congo |
| title_full | Expansion of the cassava brown streak disease epidemic in eastern Democratic Republic of Congo |
| title_fullStr | Expansion of the cassava brown streak disease epidemic in eastern Democratic Republic of Congo |
| title_full_unstemmed | Expansion of the cassava brown streak disease epidemic in eastern Democratic Republic of Congo |
| title_short | Expansion of the cassava brown streak disease epidemic in eastern Democratic Republic of Congo |
| title_sort | expansion of the cassava brown streak disease epidemic in eastern democratic republic of congo |
| topic | cassava food security smallholders farmers plant diseases democratic republic of the congo |
| url | https://hdl.handle.net/10568/116933 |
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