Experiments were conducted in the laboratory at 26 ± 1^oC and 65 ± 5% R. H. to study the effect of adding 2, 4 and 8 % dill, (Anethuem graveolenslinn.) and  parsely (Apium sativum.) seed powders to the diet, on the mortality and population growth of Sitophilus oryzae (L.) and Tribolium castancum (Herbst). The recorded results during the period of the first three weeks rearing indicated that, there are relations between the mortality percentages and the concentrations added to the diet from the used two tuted pourders. By increasing the conc., and exposiour period, increased the impact mortality.                 Meanwhile the mortality average the value of period from the first to the third month of treatment, revealed that addition of parsely, Apium sp. powder to the food of S. oryzae, obviously increased the adult mortalities at all concentrations compared with dill powder. But the mortality mean value of T. castaneum, recorded during the override from the 7^st to 5^th month of rearing was greater for the diet at 8% than other treatments and control. However S. oryzae was more susceptible to the dill powder than T. castaneum. Results concerning addition of the seeds powder of dill and parsely to the diet at 2, 4 and 8 % concentrations showed also marked decline in the adult populations during the first period of rearing of S. oryzae compared with T. castaneum.                 At the same time, Apium spp. seed powder gave accepted protection to wheat grains against these insects species up to 6 months.