author(s)
Kouninki Habiba, Matseu Sakou Geraldine Noelle and Sobda Gonne

abstract
The insecticidal effect of the powder of almonds, bark of the trunk and leaves from Balanites aegyptiaca against adults, eggs, larvae and young emerging of Callosobruchus maculatus was evaluated. 1g, 1.5g and 2g of individuals or combined powders of seeds (almonds) leaves and bark of the trunk of Balanites aegyptiaca were mixed with 100g of cowpea seed. The controls were made up with cowpea seed only. Four replications were performed on 20 pairs of weevils. The bark powder was the most effective on adults and young emerging of Callosobruchus maculatus with 100 % effect after 3 and 16 days respectively. The almonds powder was the most effective on eggs after 9 and larvae after 16 days with 100 and 80% respectively of mortality. Regarding the combinations of the different plant powder, 100% of adult mortality rates and young emerging were obtained with 1.5g of combination, whereas the maximum rate of mortality of the eggs and larvae were obtained at a dose of 2g of mixture powder. Seeds powders and barks of Balanites aegyptiaca taken individually or combined offer the interesting perspectives to control against Callosobruchus maculatus in order to preserve cowpea during storage.