Effets de Boscia senegalensis (Pers.) Lam. Ex Poir. (Capparaceae) sur l'évolution des populations de bruches dans les systèmes de stockage traditionnel de niébé (Vigna unguiculata (L.) Walp) en zone sahélienne

Abstract

Effects of B. senegalensis (Pers.) Lam. Ex Poir. (Capparaceae) on Bruchids Populations within Storage Traditional System of Cowpea beans (Vigna unguiculata (L.) Walp) in Sahelian Area. Bruchidius atrolineatus Pic. (Coleoptera- Bruchidae) and Callosobruchus maculatus Fab. (Coleoptera-Bruchidae) are, in Sahelian area, the most important pests of cowpea beans, (Vigna unguiculata (L.) Walp). Cowpea infestation by these two species of bruchids starts in the field at the beginning of the plant fruit bearing and continues during storages where damage can be high if no control action is taken. In this study, the impact of several introductions of B. senegalensis (Pers.) Lam. Ex Poir. (Capparaceae), an insecticidal plant which is usually used by farmers in Niger, on the population dynamics of the two bruchids species in traditional cowpea storage system has been investigated. The results obtained from this study point out that bruchid populations are more important in the standard jars than in the one, which have received regular inputs of B. senegalensis. Thus, preservation action by regular inputs of B. senegalensis seems to be an efficient way to control bruchids in the cowpea traditional storage system.

Keywords

• Bruchids
• Cowpea
• Insecticidal plant
• Control