This The present invention provides a glyoxime derivative displaying excellent pesticidal effect or a salt thereof and a pesticide containing the same as an active ingredient. This pesticide is characterized in by containing as an active ingredient a glyoxime derivative expressed by the general formula [1I] (in which the formula, X represents a cyano group or a carbamoyl group, R1 represents a C1-C8 alkyl group, a C3-C6 cycloalkyl C1-C6 alkyl group, etc., and R2 represents a hydrogen atom, a C1-C8 alkyl group, a C3-C6 cycloalkyl C1-C6 alkyl group, etc.) or an agriculturally acceptable salt thereof.本發明提供一種具有優異有害生物防治效果的乙二肟衍生物或其鹽、及含有其作為有效成分之有害生物防治劑。本發明之有害生物防治劑特徵在於含有以通式[I]表示之乙二肟(GLYOXIME)衍生物或其農業上可接受之鹽作為有效成分：[式中，X表示氰基或胺甲醯基；R1表示C1~C8烷基、C3~C6環烷基C1~C6烷基等；R2表示氫原子、C1~C8烷基、C3~C6環烷基C1~C6烷基等]。
