Fuente: WIPO "tomato" The present invention relates to a synergistic pesticidal composition for controlling pest infection in plants, more particularly to a synergistic composition comprising at least three active ingredients selected from (I) a mitochondrial complex I electron transport inhibitor selected from Tolfenpyrad; (II) acetyl-CoA carboxylase inhibitor selected from Spidoxamat, Spirodiclofen, Spiromesifen, Spiropidion, and Spirotetramat; and (III)nicotinic acetylcholine receptor (nAChR) channel blocker is selected as Thiocyclam Hydrogen Oxalate. The invention further relates to a process of preparing said composition along with one or more inactive excipient and formulation thereof. The composition overcomes the pest infestations much more efficiently and provides the advantages of overcoming the resistance of the pest to the use of the individual components of the pesticide composition, improved shelf life, increased spectrum of activity, better crop quality, enhanced efficacy, and economic and ecological advantages i.e. more yield, less expensive and environmentally safe composition.