Cowpea seeds were irradiated with gamma at different doses of (0 - 900) Gy and stored for period of six months. During this period data were taken by counting the number of damage and death weevil (Callosobruchus maculatus). The results show that there are significant difference between non-irradiated (0 Gy) cowpea when compare with irradiate cowpea, while there is no significant difference in the radiated gamma doses of 300 Gy, 600 Gy and 900 Gy. The non-irradiated showed high damaged from weevil (Callosobruchus maculatus) (P<0.05) when compared to the 300 Gy, 600 Gy and 900 Gy. This research shown that gamma radiation of 300 – 900 Gy can effectively preserved cowpea against weevil (Callosobruchus maculatus) during storage for period of six months. Based on this result, these doses are recommended.

Keywords : Cowpea, Calosobruchus Maculatus, GammaIrradiation, Preservation.