To provide a pesticidal composition having a stable and high pesticidal effect. The pesticidal composition comprises a pyridine compound represented by the formula (I): (wherein R 1 is CH 2 CN or and each of R 2 and R 3 which are independent of each other, is a hydrogen atom, a halogen atom, C 1-6 alkyl or C 1-6 alkoxy) or its salt and at least one potency-enhancing component selected from the group consisting of a nonionic surface active agent, an anionic surface active agent, a cationic surface active agent, an amphoteric surface active agent, an animal or plant oil, a mineral oil, a water-soluble polymer, a resin and a wax.
