Foliar diseases and the associated fungi in rice cultivated in Kenya

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cg.authorship.typesCGIAR and developing country instituteen
cg.authorship.typesCGIAR and advanced research instituteen
cg.contributor.affiliationMaseno Universityen
cg.contributor.affiliationInternational Livestock Research Instituteen
cg.contributor.affiliationUniversity of Embuen
cg.contributor.affiliationKenya Agricultural and Livestock Research Organizationen
cg.contributor.affiliationInternational Rice Research Instituteen
cg.contributor.affiliationUniversity of Arkansas Systemen
cg.contributor.affiliationUniversity of East Angliaen
cg.contributor.donorBiotechnology and Biological Sciences Research Council, United Kingdomen
cg.coverage.countryKenyaen
cg.coverage.iso3166-alpha2KEen
cg.coverage.regionAfricaen
cg.coverage.regionEastern Africaen
cg.creator.identifierBernice Waweru: 0000-0002-1788-1567en
cg.creator.identifierMartina kyalo: 0000-0001-9426-8152en
cg.creator.identifierCathrine Ziyomo: 0000-0002-6478-3273en
cg.howPublishedFormally Publisheden
cg.identifier.doihttps://doi.org/10.3390/plants11091264en
cg.isijournalISI Journalen
cg.issn2223-7747en
cg.issue9en
cg.journalPlantsen
cg.reviewStatusPeer Reviewen
cg.subject.ilriCROPSen
cg.volume11en
dc.contributor.authorNg'ang'a, Everlyne M.en
dc.contributor.authorKyallo, Martina M.en
dc.contributor.authorOrwa, P.en
dc.contributor.authorRotich, F.en
dc.contributor.authorGichuhi, E.en
dc.contributor.authorKimani, J.M.en
dc.contributor.authorMwongera, D.en
dc.contributor.authorWaweru, Berniceen
dc.contributor.authorSikuku, P.en
dc.contributor.authorMusyimi, D.M.en
dc.contributor.authorMutiga, Samuel K.en
dc.contributor.authorZiyomo, Cathrineen
dc.contributor.authorMurori, R.en
dc.contributor.authorWasilwa, L.en
dc.contributor.authorCorrel, J.C.en
dc.contributor.authorTalbot, N.J.en
dc.date.accessioned2022-05-20T09:34:03Zen
dc.date.available2022-05-20T09:34:03Zen
dc.identifier.urihttps://hdl.handle.net/10568/119606
dc.titleFoliar diseases and the associated fungi in rice cultivated in Kenyaen
dcterms.abstractWe conducted a survey to assess the occurrence and severity of rice blast and brown spot diseases on popular cultivars grown in the Busia, Kirinyaga, and Kisumu counties of Kenya in 2019. Working with agricultural extension workers within rice production areas, we interviewed farmers (n = 89) regarding their preferred cultivars and their awareness of blast disease, as this was the major focus of our research. We scored the symptoms of blast and brown spot and assessed the lodging, plant height, and maturity of the crops (days after planting). Furthermore, we collected leaf and neck tissues for the assessment of the prevailing fungal populations. We used specific DNA primers to screen for the prevalence of the causal pathogens of blast, Magnaporthe oryzae, and brown spot, Cochliobolus miyabeanus, on asymptomatic and symptomatic leaf samples. We also conducted fungal isolations and PCR-sequencing to identify the fungal species in these tissues. Busia and Kisumu had a higher diversity of cultivars compared to Kirinyaga. The aromatic Pishori (NIBAM 11) was preferred and widely grown for commercial purposes in Kirinyaga, where 86% of Kenyan rice is produced. NIBAM108 (IR2793-80-1) and BW196 (NIBAM 109) were moderately resistant to blast, while NIBAM110 (ITA310) and Vietnam were susceptible. All the cultivars were susceptible to brown spot except for KEH10005 (Arize Tej Gold), a commercial hybrid cultivar. We also identified diverse pathogenic and non-pathogenic fungi, with a high incidence of Nigrospora oryzae, in the rice fields of Kirinyaga. There was a marginal correlation between disease severity/incidence and the occurrence of causal pathogens. This study provides evidence of the need to strengthen pathogen surveillance through retraining agricultural extension agents and to breed for blast and brown spot resistance in popular rice cultivars in Kenya.en
dcterms.accessRightsOpen Accessen
dcterms.audienceScientistsen
dcterms.available2022-05-07en
dcterms.bibliographicCitationNganga, E.M., Kyallo, M., Orwa, P., Rotich, F., Gichuhi, E., Kimani, J.M., Mwongera, D., Waweru, B., Sikuku, P., Musyimi, D.M., Mutiga, S.K., Ziyomo, C., Murori, R., Wasilwa, L., Correl, J.C. and Talbot, N.J. 2022. Foliar diseases and the associated fungi in rice cultivated in Kenya. Plants 11(9):1264.en
dcterms.issued2022-05-01en
dcterms.languageenen
dcterms.licenseCC-BY-4.0en
dcterms.publisherMDPIen
dcterms.subjectriceen
dcterms.subjectplant diseasesen
dcterms.typeJournal Articleen

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