author(s)
Ablaye Faye, Toffène Diome, Aliou Faye and Mbacké Sembène

abstract
This study was carried out under peasant conservation conditions. It intends to assess the effect of the leaves of certain plants (Crateava religiosa, Azadirachta indica and Senna occidentalis) against Callosobruchus maculatus, the main pest of cowpea stocks. Our study seeks to assess the impact of these plants on the reduction in weight of cowpea seeds inflicted by C. maculatus during storage. The cracking of the dry leaves of these plants was mixed with the cowpea seeds. For each plant, three doses were used. With the highest dose (D₁ (35.71g / kg), Senna occidentalis was more effective (1.5%) in reducing cowpea weight loss than other plants. It turns out with this dose that A. indica is effective. The holes caused by this insect were counted on 1000 seeds from each test. The dose D₁ is more effective than the other doses (D₂ (25g / kg) and D₃ (12.5g / kg)) on reducing the number of holes with the application of all plants except S. occidentalis. This plant proved to be more effective (2.247 holes / seed) than the others with the D₂ dose. Our study also revealed that the number of holes does not always provide information on the weight loss of the seeds. This is explained by the difference in size observed in adults of this beetle emerging from the holes.