The efficiency of gamma radiation (20 and 40 Gy) either alone or in combination with some plant powders (soybean and lupine) at ratio of 4% (w/w) on protecting pulses against Callosobruchus maculatus has been studied. Generally the mortality percentage of adults increased as the radiation dose was increased from 20 to 40 Gy. Combination of soybean powder and (40 Gy) gamma radiation highly effect than either separate treatment. The radiation doses tested significantly decreased the total number of eggs per female. However, when plant powders combined with gamma radiation have caused highly significant decrease in the eggs number. Gamma radiation alone or combined with plant powders was highly effective in decreasing the adult emergence, while the percentage of males emerged increased. Radiation was significantly increased the developmental   period as compared with that of the control. The combination of soybean and radiation caused highly significant prolongation when reared on faba bean.