A biopesticide is a critical component to integrated pest management, as they are a more eco-friendly and safer alternative to chemical pesticides. We investigated the biopesticide properties of leaf powders of Cassia auriculata using different solvents as well as identified the phytochemicals using qualitative analysis and gas chromatography-mass spectrometry (GC-MS). From the extracts of Cassia auriculata based petroleum benzene and ethanol the concentration of terpenoids, fatty acids, phenolic compounds, and steroids were noted in the highest quantity. Cassia auriculata leaves were extracted using various solvents to determine the ability of their toxic compounds to control the cowpea beetle, Callosobruchus maculatus. Toxicity was recorded after the exposure times of 24, 48 and 72 hours. The highest toxicity (60.32& LC50 19.05 mg/ml) of callosobruchus maculatus was caused by petroleum benzene, followed by ethanol (52.48% & LC50 23.98 mg/ml), water (39.04% & LC50 45.70 mg/ml), chloroform (25.79% & LC50 89.13 mg/ml) and benzene (23.84% & LC50 91.2 mg/ml) after 72 hours. As a result of our study, we concluded that cassia auriculata phytocompounds protect stored cowpea against callosobruchus maculatus.  It is possible to recommend cassia auriculata phytocompounds as a viable alternative to synthetic pesticides, since they are economical, available at farmer level, and eco-friendly

Key words: Bio pesticide, Callosobruchus maculatus, Cassia Auriculata, phytocompound and toxicity