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Spatial analysis of temporal changes in the pandemic of severe cassava mosaic disease in Northwestern Tanzania

dc.contributor.authorSzyniszewska, A.M.
dc.contributor.authorBusungu, C.
dc.contributor.authorBoni, S.B.
dc.contributor.authorShirima, R.
dc.contributor.authorBouwmeester, H.J.
dc.contributor.authorLegg, J.P.
dc.date.accessioned2019-12-04T11:10:24Z
dc.date.available2019-12-04T11:10:24Z
dc.date.issued2017-10
dc.identifier.citationSzyniszewska, 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.
dc.identifier.issn0031-949X
dc.identifier.urihttps://hdl.handle.net/20.500.12478/2126
dc.descriptionPublished online: 8 Sept 2017
dc.description.abstractTo 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.
dc.description.sponsorshipBill & Melinda Gates Foundation
dc.description.sponsorshipBiotechnology and Biological Sciences Research Council, United Kingdom
dc.format.extent1-14
dc.language.isoen
dc.subjectAfrican Cassava Mosaic Virus
dc.subjectDiseases
dc.subjectCassava
dc.subjectFood Security
dc.subjectPandemic
dc.subjectSpatial Analysis
dc.subjectGeospatial
dc.titleSpatial analysis of temporal changes in the pandemic of severe cassava mosaic disease in Northwestern Tanzania
dc.typeJournal Article
dc.description.versionPeer Review
cg.contributor.crpClimate Change, Agriculture and Food Security
cg.contributor.crpGenebanks
cg.contributor.crpRoots, Tubers and Bananas
cg.contributor.affiliationRothamsted Research
cg.contributor.affiliationKagoshima University
cg.contributor.affiliationInternational Institute of Tropical Agriculture
cg.contributor.affiliationGeospace, Netherlands
cg.coverage.regionAfrica
cg.coverage.regionEast Africa
cg.coverage.countryTanzania
cg.isijournalISI Journal
cg.authorship.typesCGIAR and developing country institute
cg.iitasubjectCassava
cg.iitasubjectClimate Change
cg.iitasubjectPlant Diseases
cg.journalPhytopathology
cg.howpublishedFormally Published
cg.accessibilitystatusOpen Access
local.dspaceid90656
cg.targetaudienceScientists
cg.identifier.doihttp://dx.doi.org/10.1094/phyto-03-17-0105-fi


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