This study was conducted to find the feasibility of prolonging the storage period of the internal phase of the larvae of Apanteles angaleti parasite at 15˚C temperature for various periods of time: 0, 72, 113, 126, 140, 182, 184 days to figure out the impact of cooled storage on the efficacy of the produced females post storing period. It has been shown in the results that the periods of growth of both the parasite and the host under 27˚C after various storing periods at 15˚C varies statistically of growth for both host and parasite not exposed to cooling from the periods' regime. Prolonging the period of storing under 15˚C temperature for up to 184 days might affect the percentage of development of both the host and the parasite. Furthermore, it has also been noticed that the sex ratio and the ages of the first generation were affected.