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Distribution of Pseudocercospora species causing Sigatoka leaf diseases of banana in Uganda and Tanzania

dc.contributor.authorKimunye, J.N.
dc.contributor.authorWere, E.
dc.contributor.authorMussa, F.
dc.contributor.authorTazuba, A.
dc.contributor.authorJomanga, K.
dc.contributor.authorViljoen, A.
dc.contributor.authorSwennen, R.
dc.contributor.authorMuthoni, F.K.
dc.contributor.authorMahuku, G.
dc.date.accessioned2020-07-06T14:40:06Z
dc.date.available2020-07-06T14:40:06Z
dc.date.issued2020-01
dc.identifier.citationKimunye, J.N., Were, E., Mussa, F., Tazuba, A., Jomanga, K., Viljoen, A., ... & Mahuku, G. (2020). Distribution of Pseudocercospora species causing sigatoka leaf diseases of banana in Uganda and Tanzania. Plant Pathology, 69(1), 50-59.
dc.identifier.issn0032-0862
dc.identifier.urihttps://hdl.handle.net/20.500.12478/6895
dc.description.abstractSigatoka leaf diseases are a major constraint to banana production. A survey was conducted in Tanzania and Uganda to assess the distribution of Pseudocercospora species and severity of Sigatoka leaf diseases. Pseudocercospora species were identified using species‐specific primers. Sigatoka‐like leaf diseases were observed in all farms and on all cultivars, but disease severity varied significantly (P < 0.001) between countries, districts/regions within countries, altitudinal ranges and banana cultivars. In all regions except Kilimanjaro, P. fijiensis, the causal agent of black Sigatoka, was the only pathogen associated with Sigatoka disease. Mycosphaerella musae was associated with Sigatoka‐like symptoms in Kilimanjaro region. Black Sigatoka disease was more severe in Uganda, with a mean disease severity index (DSI) of 37.5%, than in Tanzania (DSI = 19.9%). In Uganda, black Sigatoka disease was equally severe in Luwero district (mean DSI = 40.4%) and Mbarara district (mean DSI = 37.9%). In Tanzania, black Sigatoka was most severe in Kagera region (mean DSI = 29.2%) and least in Mbeya region (mean DSI = 11.5%). Pseudocercospora fijiensis, the most devastating sigatoka pathogen, was detected at altitudes of up to 1877 m a.s.l. This range expansion of P. fijiensis, previously confined to altitudes lower than 1350 m a.s.l. in East Africa, is of concern, especially for smallholder banana farmers growing the susceptible East African Highland bananas (EAHB). Among the banana varieties sampled, the EAHB, FHIA hybrids and Mchare were the most susceptible. Here, the loss of resistance in Yangambi KM5, a banana variety previously resistant to P. fijiensis, is reported for the first time.
dc.description.sponsorshipInternational Institute of Tropical Agriculture
dc.format.extent50-59
dc.language.isoen
dc.subjectDiseases
dc.subjectDisease Control
dc.subjectMusa
dc.subjectPseudocerospora
dc.subjectBananas
dc.subjectEast Africa
dc.titleDistribution of Pseudocercospora species causing Sigatoka leaf diseases of banana in Uganda and Tanzania
dc.typeJournal Article
cg.contributor.crpAgriculture for Nutrition and Health
cg.contributor.crpRoots, Tubers and Bananas
cg.contributor.affiliationInternational Institute of Tropical Agriculture
cg.contributor.affiliationStellenbosch University
cg.contributor.affiliationKatholieke Universiteit, Leuven
cg.coverage.regionAfrica
cg.coverage.regionEast Africa
cg.coverage.countryTanzania
cg.coverage.countryUganda
cg.coverage.hubEastern Africa Hub
cg.researchthemeBiometrics
cg.researchthemeBiotech and Plant Breeding
cg.researchthemePlant Production and Health
cg.identifier.bibtexciteidKIMUNYE:2020
cg.isijournalISI Journal
cg.authorship.typesCGIAR and developing country institute
cg.iitasubjectAgronomy
cg.iitasubjectBanana
cg.iitasubjectDisease Control
cg.iitasubjectPlant Breeding
cg.iitasubjectPlant Diseases
cg.iitasubjectPlant Health
cg.iitasubjectPlant Production
cg.journalPlant Pathology
cg.notesOpen Access Article; Published online: 11 Oct 2019
cg.accessibilitystatusOpen Access
cg.reviewstatusPeer Review
cg.usagerightslicenseCreative Commons Attribution 4.0 (CC BY 0.0)
cg.targetaudienceScientists
cg.identifier.doihttps://dx.doi.org/10.1111/ppa.13105
cg.iitaauthor.identifierRony Swennen: 0000-0002-5258-9043
cg.iitaauthor.identifierGeorge Mahuku: 0000-0001-8444-8651


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