Wilt disease in pea has caused major crop losses worldwide is motivating the researches to focusing on developing innovative disease management methods. In the present time, without application of hazardous chemicals the maintenance of sustainable agriculture is not possible. In present study, we evaluated the effect of plant mediating silver nanoparticles (AgNPs) against F. pallidoroseum under in vitro and in vivo conditions. The AgNPs were synthesized biologically by using plants extract and these AgNPs characterized by using different types of techniques such as UV-Vis Spectroscopy, Atomic force microscope (AFM), Fourier Transform Infra-Red (FTIR), Field Emission Scanning Electron Microscopy (FESEM), and Energy Dispersive X-Ray (EDX).The inhibition percentage (87.5%) of F.pallidoroseum caused by AgNPs treatments was established in vitro. Field experiment was conducted to compare the efficiency of AgNPs and chemical fungicide at the parameters of pods numbers, pods weight, seed number and seed weight. The data were analysed by SPSS for descriptive statistics and analysis of variance (ANOVA) and results were found to be significant for different parameters at 0.05 significance levels that are average mean of seed weight (53.56 gm), pod weight(2.34 gm), mean of average number of seed (10) and mean of average no of pod (27) is found to be high in AgNPs treatments as compare to chemical fungicides. It is concluded by the experiment that AgNPs may be prove to be potential fungicides in near future and it is an excellent alternative to chemical fungicides.