Epidemic networks and potential sources of bacterial wilt infection in a potato seed network in Kenya

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cg.authorship.typesCGIAR and developing country instituteen
cg.authorship.typesCGIAR and advanced research instituteen
cg.contributor.affiliationUniversity of Nairobien
cg.contributor.affiliationUniversity of Floridaen
cg.contributor.affiliationInternational Potato Centeren
cg.coverage.countryKenya
cg.coverage.iso3166-alpha2KE
cg.coverage.regionAfrica
cg.coverage.regionEastern Africa
cg.creator.identifierSospeter Gachamba: 0000-0001-9327-3259
cg.creator.identifierKelsey F Andersen: 0000-0003-1812-2009
cg.creator.identifierKaren Garrett: 0000-0002-6578-1616
cg.creator.identifierDouglas Miano: 0000-0001-5480-6913
cg.creator.identifierkalpana sharma: 0000-0002-4104-8671
cg.identifier.doihttps://doi.org/10.31220/agrirxiv.2022.00117en
cg.issn2791-1969en
cg.journalagriRxiven
cg.subject.cipPOTATO AGRI-FOOD SYSTEMSen
cg.subject.cipPOTATOESen
cg.subject.cipSEED SYSTEMSen
cg.volume2022en
dc.contributor.authorGachamba, S.en
dc.contributor.authorXing, Y.en
dc.contributor.authorAndersen, K.F.en
dc.contributor.authorGarrett, K.A.en
dc.contributor.authorMiano, D.W.en
dc.contributor.authorMwang’ombe, A.W.en
dc.contributor.authorSharma, K.en
dc.date.accessioned2023-11-28T20:42:12Zen
dc.date.available2023-11-28T20:42:12Zen
dc.identifier.urihttps://hdl.handle.net/10568/134775
dc.titleEpidemic networks and potential sources of bacterial wilt infection in a potato seed network in Kenyaen
dcterms.abstractPotato seed systems in Kenya are largely informal, characterized by high seed degeneration due to the buildup of seed- and soil-borne diseases, including bacterial wilt caused by Ralstonia solanacearum. Informal sources of seed include neighbors, local markets and farmer-saved seed, and present a risk for spread and establishment of disease. To understand the larger context of potato disease risk in Kenya, we used network analysis to evaluate (1) epidemic risk through potato trade networks centered around East Africa, and (2) locations in East Africa likely to be particularly important for epidemic management because of their high potato cropland connectivity. We evaluated the interactions of the key stakeholders in a potato seed system and used network analysis to identify locations that are likely to be important for the spread of infection of R. solanacearum in a potato seed distribution network in Meru, Kenya. Household details, seed sources, quantities sold, pest incidence and management practices, knowledge about seed degeneration and farmers' sources of information on potato production were obtained and analyzed. The survey revealed that self-saved, neighbors, seed companies, friends, exchange, and markets are the main seed sources. Only 43% of total seed transacted was certified. Users of uncertified seeds have high disease risk, and this is an especially important risk if their roles in the network give them the potential to be 'superspreaders' of disease.en
dcterms.accessRightsOpen Access
dcterms.audienceAcademicsen
dcterms.audienceCGIARen
dcterms.audienceDevelopment Practitionersen
dcterms.audienceDonorsen
dcterms.audienceExtensionen
dcterms.audienceFarmersen
dcterms.audienceGeneral Publicen
dcterms.audienceNGOsen
dcterms.audiencePolicy Makersen
dcterms.audienceScientistsen
dcterms.available2022-01-11
dcterms.bibliographicCitationGachamba, S.; Xing, Y.; Andersen, K.F.; Garrett, K.A.; Miano, D.W.; Mwang’ombe, A.W.; Sharma, K. 2022. Epidemic networks and potential sources of bacterial wilt infection in a potato seed network in Kenya. agriRxiv. ISSN 2791-1969.en
dcterms.issued2022-01-11
dcterms.languageen
dcterms.licenseCC-BY-4.0
dcterms.publisherCABI Publishingen
dcterms.subjectpotatoesen
dcterms.subjectseed systemsen
dcterms.subjectralstonia solanacearumen
dcterms.typePreprint

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