To provide a pesticidal composition having a stable and high pesticidaleffect.The pesticidal composition comprises a pyridine compound represented by theformula(I):(see formula I)(wherein R1 is CH2CN or(see formula II)and each of R2 and R3 which are independent of each other, is a hydrogen atom,ahalogen atom, C1-6 alkyl or C1-6 alkoxy) or its salt and at least one potency-enhancingcomponent selected from the group consisting of a nonionic surface activeagent, ananionic surface active agent, a cationic surface active agent, an amphotericsurfaceactive agent, an animal or plant oil, a mineral oil, a water-soluble polymer,a resin and awax.