abstract |
An object of the present invention is to provide a mesoionic compound or a salt thereof which exhibits better control effect on various pests. Formula (1) (wherein, R 1 is selected from a hydrogen atom or the like; R 2 represents a phenyl group which may be substituted, R 3 is selected from a hydrogen atom or the like; R 4 is selected from a hydrogen atom or the like R 5 is selected from an optionally substituted ethylene group and the like, and X is selected from an oxygen atom and the like. |