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Potato cyst nematodes: a new threat to potato production in east Africa

dc.contributor.authorMburu, H.
dc.contributor.authorCortada-Gonzalez, L.
dc.contributor.authorHaukeland, S.
dc.contributor.authorRonno, W.
dc.contributor.authorNyongesa, M.
dc.contributor.authorKinyua, Z.
dc.contributor.authorBargul, J.L.
dc.contributor.authorCoyne, D.
dc.date.accessioned2022-08-19T09:02:12Z
dc.date.available2022-08-19T09:02:12Z
dc.date.issued2020
dc.identifier.citationMburu, H., Cortada, L., Haukeland, S., Ronno, W., Nyongesa, M., Kinyua, Z., ... & Coyne, D. (2020). Potato cyst nematodes: a new threat to potato production in East Africa. Frontiers in Plant Science, 11(670), 1-13.
dc.identifier.issn1664-462X
dc.identifier.urihttps://hdl.handle.net/20.500.12478/7664
dc.description.abstractPotato cyst nematodes (PCN), such as Globodera rostochiensis and Globodera pallida, are quarantine restricted pests of potato causing major yield and financial losses to farmers. G. rostochiensis was first reported from Kenya’s key potato growing area in 2015. We sought to determine the diversity, prevalence and distribution of PCN species across the country by conducting a country-wide survey between 2016 and 2018, which included a more focused, follow-up assessment in three key potato growing counties. A total of 1,348 soil samples were collected from 20 potato growing counties. Information regarding local potato farming practices, potato cultivar use, their diversity and availability was also recorded. PCN cysts were obtained from 968 samples (71.8%) in all the counties surveyed, with Nyandarua County recording the highest PCN field-incidence at 47.6%. The majority of PCN populations, 99.9%, were identified as G. rostochiensis, while G. pallida was recovered from just one field, in a mixed population with G. rostochiensis. Inconsistencies in PCR amplification efficiency was observed for G. rostochiensis using the recommended EPPO primers, compared with ITS primers AB28/TW81, indicating that this protocol cannot be entirely relied upon to effectively detect PCN. Egg density in Nyandarua County varied between 30.6 and 158.5 viable eggs/g soil, with an average egg viability of 78.9 ± 2.8% (min = 11.6%, max = 99.9%). The PCN-susceptible potato cultivar named Shangi was the most preferred and used by 65% of farmers due to its shorter dormancy and cooking time, while imported cultivars (Destiny, Jelly, Manitou, and Markies) with resistance to G. rostochiensis were used by 7.5% of farmers due to unavailability and/or limited access to seeds. Thus, most farmers preferred using their own farm-saved seeds as opposed to purchasing certified seeds. Establishing the distribution and prevalence of PCN and elucidating the local farming practices that could promote the spread of PCN is a necessary precursor to the implementation of any containment or management strategy in the country and ultimately across the region.
dc.description.sponsorshipFederal Ministry for Economic Cooperation and Development, Germany
dc.description.sponsorshipNorth Carolina State University
dc.format.extent1-13
dc.language.isoen
dc.subjectGlobodera Rostochiensis
dc.subjectKenya
dc.subjectSmallholders
dc.subjectFarmers
dc.subjectPotatoes
dc.titlePotato cyst nematodes: a new threat to potato production in east Africa
dc.typeJournal Article
cg.contributor.crpRoots, Tubers and Bananas
cg.contributor.affiliationInternational Centre of Insect Physiology and Ecology
cg.contributor.affiliationInternational Institute of Tropical Agriculture
cg.contributor.affiliationJomo Kenyatta University of Agriculture and Technology
cg.contributor.affiliationGhent University
cg.contributor.affiliationNorwegian Institute for Bioeconomy Research
cg.contributor.affiliationFood and Agriculture Organization of the United Nations
cg.contributor.affiliationKenya Agricultural and Livestock Research Organisation
cg.coverage.regionAfrica
cg.coverage.regionEast Africa
cg.coverage.countryKenya
cg.coverage.hubEastern Africa Hub
cg.researchthemeBiotech and Plant Breeding
cg.researchthemeNatural Resource Management
cg.identifier.bibtexciteidMBURU:2020
cg.isijournalISI Journal
cg.authorship.typesCGIAR and developing country institute
cg.iitasubjectAgronomy
cg.iitasubjectCrop Systems
cg.iitasubjectDisease Control
cg.iitasubjectFood Security
cg.iitasubjectPlant Breeding
cg.iitasubjectPlant Diseases
cg.iitasubjectPlant Production
cg.journalFrontiers in Plant Science
cg.notesPublished online: 25 May 2020
cg.accessibilitystatusOpen Access
cg.reviewstatusPeer Review
cg.usagerightslicenseCreative Commons Attribution 4.0 (CC BY 0.0)
cg.targetaudienceScientists
cg.identifier.doihttps://dx.doi.org/10.3389/fpls.2020.00670
cg.iitaauthor.identifierLAURA CORTADA: 0000-0002-5953-3798
cg.iitaauthor.identifierDaniel Coyne: 0000-0002-2030-6328
cg.futureupdate.requiredNo
cg.identifier.issue670
cg.identifier.volume11


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