The present invention relates to synergistic pesticidal composition comprising component (A) Flubendiamide component (B) at least one Strobilurin fungicides selected from from Trifloxystrobin, Azoxystrobin and component (C) at least one more fungicide (triazole) selected from Difenoconazole, Epoxiconazole, Flutriafol, Hexaconazole, Propiconazole, Prothioconazole, Tebuconazole, Tricyclazole and one or more inactive excipients. The present invention also relates to the method of preparing the said composition, comprising component (A) Flubendiamide component (B) at least one Strobilurin fungicide from Trifloxystrobin, Azoxystrobin and component (C) at least one more triazole fungicide selected from Difenoconazole, Epoxiconazole, Flutriafol, Hexaconazole, Propiconazole, Prothioconazole, Tebuconazole, and Tricyclazole.