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dc.contributor.authorNtonifor, N.
dc.contributor.authorEdimengo, P.
dc.contributor.authorTamo, M.
dc.date.accessioned2019-12-04T11:30:36Z
dc.date.available2019-12-04T11:30:36Z
dc.date.issued2006
dc.identifier.citationNtonifor, N., Edimengo, P. & Tamo, M. (2006). Bioecology of the cowpea pod weevil Piezotrachelus varius Wagner (Coleoptera: Curculionidae), and cowpea seed damage. African Entomology, 14(1), 185-191.
dc.identifier.issn1021-3589
dc.identifier.urihttps://hdl.handle.net/20.500.12478/5333
dc.description.abstractThe bioecology of the cowpea pod weevil, Piezotrachelus varius, and post-harvest seed losses were studied in the laboratory and in cowpea fields in the Western Highlands of Cameroon during the first and second cropping seasons of 1999 and 2000. Adult weevils appeared before flowering and fed on cowpea leaves and flowers before switching to newly formed pods. Pod-feeding produced holes on the pod wall mesocarp through which the female layed a cluster of 2-5 ovoid, semi-translucent eggs; the eggs hatched 3-4 days later. Three larval stages fed on the peas and pupated within the pod, usually near the damaged peas. Juveniles continued to feed in the mature harvested cowpea pods in storage; adults emerged up to two weeks after harvest. Development was completed within 16-17 days and the adults lived for more than five months. Post-harvest cowpea seed damage peaked two weeks after harvest. A number of hymenopterous parasitoids, Anisopteromalus calandrae Howard, Pteromalus sp. (Hymenoptera, Pteromalidae), Pediobius sp., Aprostocetus sp. (Hymenoptera, Eulophidae) and Bracon sp. (Hymenoptera, Braconidae) emerged from the pods. These were collected and appeared to be potential parasitoids of P. varius. During the off-season for cowpea, P. varius adults survived on cowpea haulm residue left in the field and on surrounding cultivated and indigenous alternate hosts. The implication of this bio-ecological information in the management of P. varius populations is discussed.
dc.language.isoen
dc.subjectCowpeas
dc.subjectPods
dc.subjectHarvesting
dc.subjectParasitoids
dc.titleBioecology of the cowpea pod weevil Piezotrachelus varius Wagner (Coleoptera: Curculionidae), and cowpea seed damage
dc.typeJournal Article
dc.description.versionPeer Review
cg.contributor.affiliationDepartment of Higher Education and Training, South Africa
cg.contributor.affiliationInstitute of Scientific Information, United States
cg.contributor.affiliationInternational Institute of Tropical Agriculture
cg.coverage.regionAfrica
cg.coverage.regionAcp
cg.coverage.regionSouthern Africa
cg.coverage.regionNorth America
cg.coverage.regionWest Africa
cg.coverage.countrySouth Africa
cg.coverage.countryUnited States
cg.coverage.countryBenin
cg.isijournalISI Journal
cg.authorship.typesCGIAR and developing country institute
cg.iitasubjectPlant Ecology
cg.iitasubjectPlant Diseases
cg.iitasubjectPost-Harvesting Technology
cg.iitasubjectPests Of Plants
cg.iitasubjectCowpea
cg.accessibilitystatusLimited Access
local.dspaceid103690
cg.identifier.doihttp://hdl.handle.net/10520/EJC32657


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