Competition among bruchids (Coleoptera: Chrysomelidae): Callosobruchus maculatus (Fab.) and Callosobruchus subinnotatus (Pic) on Bambara groundnut (Fabacea)
Journal Title: Scholars Academic Journal of Biosciences - Year 2016, Vol 4, Issue 3
Abstract
Interspecific competition was investigated in bruchids (Coleoptera: Chrysomelidae) major pests of stored Bambara groundnut (BGN), during eggs laying process. Field observations carried out for 2 years revealed that 2 bruchids Callosobruchus maculatus (Fab.) and Callosobruchus subinnotatus (Pic.) are major pests of BGN; C. maculatus is more prolific and dominant in the Sudano Sahelian landscape whereas C. subinnotatus is the major pest in the Sudano Guinean area. Intraspecific competition affects the amount and the fertility of eggs laid. C. maculatus laid more eggs in presence of C. subinnotatus than it does alone. Moreover, C. subinnotatus added very few barren eggs on seeds upon which C. maculatus oviposited previously. Allelo chemicals involved in this phenomenon are to be described. Keywords: Sudano Sahelian and Sudano Guinean Africa, Bambara groundnut, interspecific competition, Callosobruchus subinnotatus, C. maculatus.
Authors and Affiliations
Ngamo Tinkeu LS, Djakissam W, Ayiki EN, Madou C, Djamila Hapl-Meu
Keywords
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