Ultraviolet (UV) was used to sterilize the eggs of Angoumois Grain Moth (AGM), Sitotroga cerealella (Olivier), the Mediterranean Flour Moth (MFM), Ephestia and kuehniella Zeller to stop the embryonic development inside the eggs to be favorable for parasitism for longer time. This system was developed to prolong the storage capability of the eggs used for rearing the bioagents. Results indicated significant difference between the fecundity of Trichogramma evanescens and T. brassicae at 25°C (L.S.D at 5% 10.18) reared on AGM and MFM. The data indicated, the highest number of black eggs reached 63.5 and 38.1 when in case of T. brassicae and T. evanescens on eggs of MFM with UV, respectively. While it reached 31.9 and 16.4 for the same species on the eggs of AGM with UV, respectively.