A laboratory assessment of the effectiveness of four storage devices and Capsicum frutescens in the abatement of infestation of stored cowpeas by Callosobruchus maculatus (Coleoptera: Bruchidae)
1993
Lale, N.E.S. (Port Harcourt Univ. (Nigeria). Dept. of Zoology)
Four storage systems, of which three were ventilated to varying degrees and one unventilated, were assessed in the laboratory for their effectiveness in reducing infestation of stored cowpeas by Callosobruchus maculatus. Experiments consisted in introducing 10 g of infested cowpeas with or without chilli pepper, Capsicum frutescens, admixture into each type of storage device. The result suggests that the level of ventilation played a significant role in the effectiveness of the storage systems in checking infestation of cowpeas by the bruchid. The unventilated plastic device was the most effective both in enhancing the efficacy of C. frutescens as a grain protectant, and in the reduction of fecundity and adult emergence of C. maculatus. It was suggested consequently that the adoption by peasant farmers of a storage system with minimal ventilation in conjunction with C. frutescens as a grain protectant could be a cheaper option in the protection of stored cowpeas against C. maculatus infestation.
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