The pestilence of commercially significant crops by insects threatens global food security. Over the past few decades, chemical pesticides have been widely utilized to control insect pests all over the world. These substances, however, are harmful to both the ecology and human health. Several problems have also developed resistance to a variety of pesticides. The search for environmentally suitable substitutes prompted researchers to produce biocontrol agents such as entomopathogenic fungi, this fungus belonging to a number of taxa that effectively infect and kill insects. Additionally, they are highly host-specific, have a minimal impact on organisms other than the target, and are easily and swiftly manufactured in large quantities. The entomopathogenic fungus, Lecanicillium lecanii, was used to probe whether it has an impact on the mating behavior, fertility, and egg production of adults Sitophilus granaries. showed the efficiency of the fungal concentrations on the adults at ages 24 h that effect, reflecting that effect in the mating capacity and the rate of egg production, and the lowest rate of productivity eggs when mated male's treatment with female treatment was 18.3 at 2x 108 spores/ ml, also the lowest percentage of hatching eggs was 38 % at 2x 108spores/ ml and the highest rate of hatching period was 6.8 at 2x 108spores/ ml. when mated males untreated with females treated with fungal the rate of productivity of eggs was 18.8 , 24.2, and 24.8 at concentrations ( 2x 108, 2 x 106 , 2x 104 spores/ ml) respectively while the lowest percentage of hatching eggs was 56 % at 2x 108spores/ ml . This results indicate that Lecanicillium lecanii may have the potential for usefulness in the integrated control program of Sitophilus granaries.