A research was conducted to observ the residual effect of six protectant insec!icides in wheat stored for 120 days. The research was conducted at the Agricultural research center of Tibaitata with an average temperature of 12.9°C and 79% relative humidity. The storage conditions were 16°C and 64% relative humility. Three dosages insecticides were used against S. oryzae (L.) and S. cerealella (Oliver). Pirimifosmetil, Deltametrina, Fenitrotin and cytlutrin at dosages of 4.0,0.37,4.0, and 3.0 mg/kg. (ppm) respectively controlled S. oryzae effectively. Deltametrina Pirimifos Fenitrotin and cyflutrin used at the same dosages, controlled S. cerealella. The effectiveness of the control followed the same order as the insecticides listed. Diclorvos in three dosages and malathion at 4.0 mglkg lost efectivity alter 60 days of the appliation for both species. Malathion at 8.12 mg/kg was not effective after 90 days of application. Grain insecticide residues were not higher than the maximun allowed by the OMS and FAO for all dosages.