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The role of the whitefly, Bemisia tabaci (Gennadius), and farmer practices in the spread of cassava brown streak ipomoviruses

dc.contributor.authorMaruthi, M.N.
dc.contributor.authorJeremiah, S.C.
dc.contributor.authorMohammed, I.U.
dc.contributor.authorLegg, J.P.
dc.date.accessioned2019-12-04T11:09:07Z
dc.date.available2019-12-04T11:09:07Z
dc.date.issued2017
dc.identifier.citationMaruthi, M.N., Jeremiah, S.C., Mohammed, I.U. & Legg, J.P. (2017). The role of the whitefly, Bemisia tabaci (Gennadius), and farmer practices in the spread of cassava brown streak ipomoviruses. Journal of Phytopathology, 1-11.
dc.identifier.issn0931-1785
dc.identifier.urihttps://hdl.handle.net/20.500.12478/1981
dc.descriptionArticle purchased; Published online: 22 August 2017
dc.description.abstractCassava brown streak disease (CBSD) is arguably the most dangerous current threat to cassava, which is Africa's most important food security crop. CBSD is caused by two RNA viruses: Cassava brown streak virus (CBSV) and Ugandan cassava brown streak virus (UCBSV). The roles of the whitefly Bemisia tabaci (Gennadius) and farmer practices in the spread of CBSD were investigated in a set of field and laboratory experiments. The virus was acquired and transmitted by B. tabaci within a short time (5–10 min each for virus acquisition and inoculation), and was retained for up to 48 hr. Highest virus transmission (60%) was achieved using 20–25 suspected viruliferous whiteflies per plant that were given acquisition and inoculation periods of 24 and 48 hr, respectively. Experiments mimicking the agronomic practices of cassava leaf picking or the use of contaminated tools for making cassava stem cuttings did not show the transmission of CBSV or UCBSV. Screenhouse and field experiments in Tanzania showed that the spread of CBSD next to spreader rows was high, and that the rate of spread decreased with increasing distance from the source of inoculum. The disease spread in the field up to a maximum of 17 m in a cropping season. These results collectively confirm that CBSV and UCBSV are transmitted by B. tabaci semipersistently, but for only short distances in the field. This implies that spread over longer distances is due to movements of infected stem cuttings used for planting material. These findings have important implications for developing appropriate management strategies for CBSD.
dc.description.sponsorshipBill & Melinda Gates Foundation
dc.format.extent1-11
dc.language.isoen
dc.subjectCassava
dc.subjectDiseases
dc.subjectBemisia Tabaci
dc.subjectVirus Diseases
dc.subjectCassava Brown Streak Disease
dc.subjectDisease Spread
dc.subjectVirus Transmission
dc.subjectWhitefly
dc.titleThe role of the whitefly, Bemisia tabaci (Gennadius), and farmer practices in the spread of cassava brown streak ipomoviruses
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.affiliationUniversity of Greenwich
cg.contributor.affiliationMinistry of Agriculture, Livestock and Fisheries Development, Tanzania
cg.contributor.affiliationInternational Institute of Tropical Agriculture
cg.coverage.regionAfrica
cg.coverage.regionEast Africa
cg.coverage.countryTanzania
cg.isijournalISI Journal
cg.authorship.typesCGIAR and developing country institute
cg.iitasubjectCassava
cg.iitasubjectDisease Control
cg.iitasubjectPlant Diseases
cg.journalJournal of Phytopathology
cg.howpublishedFormally Published
cg.accessibilitystatusOpen Access
local.dspaceid85537
cg.targetaudienceScientists
cg.identifier.doihttp://dx.doi.org/10.1111/jph.12609


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