The pest is usually applied to signify a species of insects destructive to cultivated plants and stored grains. A pest is an organism whose papulation often increase above a certain level of economic injury and its existence conflict with man’s welfare convenance and profits. When economic injury level is greater need to control the pest damage enforcing biopesticides rather than disadvantages of chemical pesticides to conserve the domestic grains. Looking toward all referred medicinal benefits of Syzygigum cumini (Jambhul) was selected as precursor for the biopesticide formulations for the preservation of domestic food grains, the Vigna aconitifolius (Moth bean) and Vigna radiates (Mung bean). Results from study reveals that extract of leaves Syzygium cumini (jambhul) in chloroform and acetone is effective counter to Callosobruchus macultus which help in preservations Vigna aconitifolia (Mataki) and Vigna radiata (Mung) so that we save its nutritive values. The tabulated data studded by using Method of Lowry’s et al., (1951 for protein shown that losses from respective grains were decline as concentrations of screened bio-pesticide increased. Along with pesticidal properties the refereed medicinal importance of plant, Syzygium cumini contract additional benefits to human food.