A pesticidal composition comprises at least one compound selected from a 1-(3-pyridyl-N-oxide)pyrazole compound of formula I, II, or III, or any agriculturally acceptable salt thereof, wherein R1, R2, R3, R4, R5, R6, R7, R8, R12, R13, Y, and Q, are as described herein. A method of controlling pests comprises applying the pesticidal composition near a population of pests.一種殺蟲組成物,其包含選自具化學式I、II或III的1-(3-吡啶基-N-氧化物)吡唑化合物之至少一種化合物,或其農業上可接受的任何鹽類,其中R1、R2、R3、R4、R5、R6、R7、R8、R12、R13、Y及Q係如本申請案所述。一種防治有害生物之方法,其包括在有害生物群體附近施用該殺蟲組成物。