Different irradiation times of UV-C significantly affect immature mortality of Callosobruchus maculatus. There was a positive relationship between UV-C irradiation times and immature mortality of C. maculatus. The net reproductive rate (R0) at Control was significantly higher than those estimated at different irradiation times. The recorded values of intrinsic rate of increase (r) were significantly affected by different irradiation times of UV-C.