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Expansion of the cassava brown streak disease epidemic in eastern Democratic Republic of Congo

dc.contributor.authorCasinga, C.M.
dc.contributor.authorShirima, R.R.
dc.contributor.authorMahungu, N.
dc.contributor.authorTata-Hangy, W.
dc.contributor.authorBashizi, K.B.
dc.contributor.authorMunyerenkana, C.M.
dc.contributor.authorUghento, H.
dc.contributor.authorEnene, J.
dc.contributor.authorSikirou, M.
dc.contributor.authorDhed'a, D.B.
dc.contributor.authorMonde, G.
dc.contributor.authorKumar, P.L.
dc.contributor.authorLegg, J.
dc.date.accessioned2021-12-21T11:02:26Z
dc.date.available2021-12-21T11:02:26Z
dc.date.issued2021-08
dc.identifier.citationCasinga, 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.
dc.identifier.issn0191-2917
dc.identifier.urihttps://hdl.handle.net/20.500.12478/7299
dc.description.abstractCassava 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.
dc.description.sponsorshipUnited States Agency for International Development
dc.format.extent2177-2188
dc.language.isoen
dc.subjectCassava
dc.subjectFood Security
dc.subjectSmallholders
dc.subjectFarmers
dc.subjectPlant Diseases
dc.subjectDemocratic Republic of the Congo
dc.titleExpansion of the cassava brown streak disease epidemic in eastern Democratic Republic of Congo
dc.typeJournal Article
cg.contributor.crpMaize
cg.contributor.crpRoots, Tubers and Bananas
cg.contributor.affiliationInternational Institute of Tropical Agriculture
cg.contributor.affiliationUniversité de Kisangani
cg.contributor.affiliationInstitut National pour l’Etude et la Recherche Agronomique, Democratic Republic of Congo
cg.contributor.affiliationInstitut Facultaire des Sciences Agronomiques, Democratic Republic of Congo
cg.coverage.regionAfrica
cg.coverage.regionCentral Africa
cg.coverage.countryDemocratic Republic of the Congo
cg.coverage.hubEastern Africa Hub
cg.coverage.hubCentral Africa Hub
cg.coverage.hubHeadquarters and Western Africa Hub
cg.researchthemePlant Production and Health
cg.identifier.bibtexciteidCASINGA:2021
cg.isijournalISI Journal
cg.authorship.typesCGIAR and developing country institute
cg.iitasubjectAgronomy
cg.iitasubjectCassava
cg.iitasubjectDisease Control
cg.iitasubjectFood Security
cg.iitasubjectPlant Breeding
cg.iitasubjectPlant Diseases
cg.iitasubjectPlant Health
cg.iitasubjectPlant Production
cg.iitasubjectSmallholder Farmers
cg.journalPlant Disease
cg.notesPublished Online:17 Aug 2021
cg.accessibilitystatusLimited Access
cg.reviewstatusPeer Review
cg.usagerightslicenseCopyrighted; all rights reserved
cg.targetaudienceScientists
cg.identifier.doihttps://dx.doi.org/10.1094/pdis-05-20-1135-re
cg.iitaauthor.identifierNzola Mahungu: 0000-0002-3781-0838
cg.iitaauthor.identifierP. Lava Kumar: 0000-0003-4388-6510
cg.iitaauthor.identifierJames Legg: 0000-0003-4140-3757
cg.futureupdate.requiredNo
cg.identifier.issue8
cg.identifier.volume105


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