Sitophilus oryzae L. produces serious damage to stored grains. The use of chemical products in the control of this pest, have led to the emergence of resistance, accumulation of waste in the environment, intoxications and increased production costs, which requires the search for effective and less toxic alternatives such as dust of plants.Objective: To evaluate the effect of different concentrations of Syzygium jambos (L.) Alston powder on Sitophilus oryzae L. in stored corn grains.Configuration and Design: A completely randomized design trial was conducted with the following treatments: 0 (control), 1.5; 2.0; 2.5; 3.0; 3.5 and 4.0% of the powder of the leaves of the botanical species / weight of corn seeds, with 15 repetitions.Materials and Methods: Adults of S. oryzae fed corn (Zea mays, L.) were used in the trials. The percentage of mortality was determined at 15 and 30 days after the treatment with the powders and the weight loss of the grains at 55 days after the start of the treatment.Statistical analysis used: The data was transformed into √% / 100 and processed by analysis of variance. The means were compared by the Tukey test for P <0.05. Conclusions: Although of Syzygium jambos (L.) Alston powder show a marked insectistatic effect on adults of Sitophilus oryzae L and reduce affectations in stored corn grains, any studied powder proportions archives mortalities over 25 % in laboratory conditions.