Fuente: WIPO "tomato" The present invention relates to a stable synergistic pesticidal composition comprising A) a compound of Formula I, i.e., 2,4-dioxo-1-(pyrimidin-5-ylmethyl)-3-[3-trifluoromethyl)phenyl] -3,4-dihydro-2H-pyrido[1,2-a] pyrimidin-1-ium-3-ide or its agrochemically acceptable salts, esters and derivatives; B) acompound of Formula IT, i.e., N-methyl-N-nitro-N- [(tetrahydro-3-furanyl)methyl] guanidine or its agrochemically acceptable salts, esters and derivatives; and C) at least one strobilurin fungicide selected from pyraclostrobin, or trifloxystrobin, or picoxystrobin or its agrochemically acceptable salts, esters or its derivatives for effective control of various pests including but not limited to insect-pests, aphids, thrips etc. and a wide range of fungal pathogens and their associates diseases. Further, the present invention also relates to a process for preparation of such pesticidal composition for synergistic and efficacious control of various pests including insects-pests and fungal pathogens and their associated diseases.