Assessment of Bruchid (Callosobruchus maculatus) Tolerance of Some Elite Cowpea (Vigna unguiculata) Varieties

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dc.contributor.authorAmusa, O. D.
dc.contributor.authorOgunkanmi, L. A.
dc.contributor.authorAdetunbi, J. A.
dc.contributor.authorAkinyosoye, S. T.
dc.contributor.authorBolarinwa, K. A.
dc.contributor.authorOgundipe, O.T.
dc.date.accessioned2019-09-05T10:05:58Z
dc.date.available2019-09-05T10:05:58Z
dc.date.issued2014
dc.description.abstractThe resistance of cowpea to bruchid infestation has been a major concern to plant breeders as some elite cowpea varieties become susceptible to the polymorphic nature of this storage insect pest. The current status of ten bruchid resistant varieties collected from the International Institute of Tropical Agriculture (IITA), Ibadan, Nigeria was evaluated for bruchid tolerance. Each of the varieties was infested with two pairs of bruchids and comparative data was taken for 60 days. Results showed a delay in bruchid emergence with mean development period for successful adult emergence ranging from 32-47 days. Nine of the varieties studied showed percentage seed damage above 80% and percentage pest tolerance below 50%. Susceptibility index indicates that seven of the studied varieties to be moderately resistant and the remaining three to be resistance to the bruchid infestation with TVu 11953 being the most resistant of all with index 1.78. Analysis of seed coat resistance indicated no significant difference in number of eggs laid, mean bruchid development time, percentage bruchid emergence, percentage seed damage and susceptibility index between the smooth and rough seed coats. The study indicates other factors, not seed coat nature to be responsible for bruchid resistance in cowpea.en_US
dc.identifier.citationAmusa, O. D., Ogunkanmi, L. A., Adetunbi, J. A., Akinyosoye, S. T., Bolarinwa, K. A. and Ogundipe, O. T. (2014). Assessment of Bruchid (Callosobruchus maculatus) Tolerance of Some Elite Cowpea (Vigna unguiculata) Varieties. Journal of Agriculture and Sustainability 6(2): 164-178en_US
dc.identifier.issn2201-4357
dc.identifier.urihttps://ir.unilag.edu.ng/handle/123456789/5184
dc.language.isoenen_US
dc.publisherInfinity pressen_US
dc.subjectBruchid resistanten_US
dc.subjectCowpeaen_US
dc.subjectCallosobruchus maculatusen_US
dc.subjectSusceptibility indexen_US
dc.subjectVigna unguiculataen_US
dc.titleAssessment of Bruchid (Callosobruchus maculatus) Tolerance of Some Elite Cowpea (Vigna unguiculata) Varietiesen_US
dc.typeArticleen_US
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