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Seasonal abundance of Plutella xylostella (Lepidoptera: Plutellidae) and diversity of its parasitoids along altitudinal gradients of the eastern Afromontane

dc.contributor.authorNgowi, B.V.
dc.contributor.authorTonnang, H.E.Z.
dc.contributor.authorKhamis, F.
dc.contributor.authorMwangi, E.M.
dc.contributor.authorNyambo, B.
dc.contributor.authorNdegwa, P.N.
dc.contributor.authorSubramanian, S.
dc.date.accessioned2019-12-04T11:36:16Z
dc.date.available2019-12-04T11:36:16Z
dc.date.issued2019-07
dc.identifier.citationNgowi, B.V., Tonnang, H.E.Z., Khamis, F., Mwangi, E.M., Nyambo, B., Ndegwa, P.N. & Subramanian, S. (2019). Seasonal abundance of Plutella xylostella (Lepidoptera: Plutellidae) and diversity of its parasitoids along altitudinal gradients of the eastern Afromontane. Phytoparasitica, 47(3), 375–391.
dc.identifier.issn0334-2123
dc.identifier.urihttps://hdl.handle.net/20.500.12478/6177
dc.descriptionPublished online: 25 June 2019
dc.description.abstractMonthly field surveys of diamondback moth (DBM), Plutella xylostella (L.) and its parasitoids were conducted to assess seasonal abundance and diversity under changing altitude. Twenty-four crucifer farms spread across three altitudinal zones of Mount Kilimanjaro and Taita hills were sampled for the insects at monthly interval from 2013 to 2014. Diamondback moth abundance differed significantly between seasons (F3, 21 = 3.883, p = 0.024) in the high zone of Taita hills. The abundance among altitudinal zones of the two transects was not significantly different (Mt. Kilimanjaro: F2, 98 = 0.415, p = 0.661; Taita hills: F2, 116 = 0.303, p = 0.739). Eight parasitoid species emerged in the laboratory from collected DBM larvae and pupae. Cotesia vestalis (Haliday) provided the most DBM parasitism in the low zone and Diadegma semiclausum (Hellen) in the medium and high zones. Parasitism by D. semiclausum increased by 32.5% between the low and medium zones (p = 0.001) of Taita hills. Diversity of parasitoid species declined considerably from the low to medium zones of Taita hills. The diversity of wild crucifer species increased with altitude but was twice as diverse in the high zone of Mt. Kilimanjaro than the high zone of Taita hills. Ecological complexity of the cropping system contributed greatly to a wider parasitoid diversity along Mt. Kilimanjaro. The introduced C. vestalis has successfully established in East Africa and adapted to the warmer areas in the low altitudes.
dc.description.sponsorshipMinistry of Foreign Affairs, Finland
dc.description.sponsorshipUnited Kingdom Aid
dc.description.sponsorshipSwedish International Development Cooperation Agency
dc.description.sponsorshipSwiss Agency for Development and Cooperation
dc.description.sponsorshipFederal Ministry for Economic Cooperation and Development, Germany
dc.description.sponsorshipGovernmen of Kenya
dc.format.extent375–391
dc.language.isoen
dc.rightsCopyrighted; all rights reserved
dc.subjectDiadegma Semiclausum
dc.subjectPlutella Xylostella
dc.subjectParasitoids
dc.subjectTanzania
dc.titleSeasonal abundance of Plutella xylostella (Lepidoptera: Plutellidae) and diversity of its parasitoids along altitudinal gradients of the eastern Afromontane
dc.typeJournal Article
dc.description.versionPeer Review
cg.contributor.affiliationInternational Centre of Insect Physiology and Ecology
cg.contributor.affiliationUniversity of Nairobi
cg.contributor.affiliationTropical Pesticides Research Institute, Tanzania
cg.contributor.affiliationInternational Maize and Wheat Improvement Center
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.iitasubjectPests Of Plants
cg.journalPhytoparasitica
cg.howpublishedFormally Published
cg.accessibilitystatusLimited Access
local.dspaceid106553
cg.targetaudienceScientists
cg.identifier.doihttps://dx.doi.org/10.1007/s12600-019-00732-3


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