Bulletin of Entomological Research (2019) 109, 595-603

D. Kosini, E.N. Nukenine, C. Saidou, J.-B.T. Noubissié and S. Dolinassou (2019)
Impact of environmental conditions and seed physico-chemical characteristics on the resistance of cowpea genotypes to Callosobruchus maculatus F. (Coleoptera: Chrysomelidae) infestation
Bulletin of Entomological Research 109 (5), 595-603
Abstract: There is a need to improve research and extension documentation to assist farmers in making better use of the available resistant cowpea genotypes to insects attack during storage. A study was conducted to determine the resistance of ten cowpea genotypes [Vigna unguiculata (L.) Walp.] to Callosobruchus maculatus F. attack in the Sudano-Guinean and Sudano-Sahelian agro-ecological zones (SS) of Cameroon. Thereafter, seeds were analyzed for physical properties and chemical composition to determine the main parameters of their resistance against C. maculatus. The SS was more suitable for insect infestation. Genotypes were classified into resistant to highly susceptible. Results showed that the physical characteristics of seeds were less important than the chemical components for conferring resistance to C. maculatus. Two genotypes, Samira and Lade, consistently demonstrated high tolerance to infestation by C. maculatus, and therefore may be recommended for use in breeding programs as a source of resistance and then to minimize the dependence on insecticides for the control of insect pests under subsistence farming conditions in Cameroon.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Elias Nukenine

Research topic(s) for pests/diseases/weeds:
resistance/tolerance/defence of host

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Callosobruchus maculatus	Stored legumes	Cameroon
	Callosobruchus maculatus	Cowpea and relatives (Vigna)	Cameroon