This work was carried out in the laboratory at stored product pests at EL-Mattana Agric. Res. Station to determine the insecticide of plant powders (S. aromaticum, P. nigrum and cattle dung ash powder) at 0.5, 1, 1.5, 2, 3 % (W/W) concentrations. While ozone gas tested at 100, 200, 400 and 600 ppm against S. granarius L. Mortality percentage were registered after 1, 3, 5, 7 and 14 days. The results obtained that increasing in concentrations from 0.5 to 3 % and 100 to 600 ppm at exposure period 1-14 days. Mortality percentage attain to 100% at concentrations 2 and 3% (W/W) at clove and black pepper after 7days. Meanwhile, at concentrations 2 and 3% (W/W) in case of cattle dung ash were 81.7 and 90.0%, respectively. Black pepper was the most effective with LC₅₀ of 0.327, while cattle dung ash was the least with LC₅₀ of 0.867 (W/W). Reduction in F₁-progeny in all treatments were greatly significant. Obtained results showed that treatment a high dose 400 and 600 of ozone gas for 5days led to full mortality of S. granarius adult, but lows dose for 14 days some survival of S. granarius adults was found at all exposure time. Based on LT₅₀ values at 400 ppm were 2.485 and 1.135, 2.15and 0.893 at 600 ppm, respectively. This mean that S. granarius mortality increased by increasing poseur time and period after treatment to ozone gas.