PARASITIC PEST CONTROL AGENT HAVING PYRIDONE COMPOUND AS ACTIVE COMPONENT, AND USE METHOD THEREOF

A compound represented by formula (1), or a salt thereof, is provided that is effective as a parasitic pest control agent. In the formula, R1 represents an optionally substituted C1-C6 alkyl group, aC1-C6 haloalkyl group, etc., R2 represents a halogen atom, an optionally substituted C1-C6 alkyl group, an optionally substituted C1-C6 alkoxy group, etc., R3 represents a hydrogen atom, a halogen atom, an optionally substituted C1-C6 alkyl group, etc., n represents an integer 0-5, X represents an oxygen atom or a sulfur atom, Y represents a phenyl group having a substituent in an ortho position,a pyridyl group and the bond that includes the dashed line represents a double bond or a single bond. 本发明提供作为寄生性有害生物驱除剂有效的式(1)表示的化合物或其盐。式中，R1表示可以被取代的C1～C6烷基、C1～C6卤代烷基等，R2表示卤素原子、可以被取代的C1～C6烷基、可以被取代的C1～C6烷氧基等，R3表示氢原子、卤素原子、可以被取代的C1～C6烷基等，n表示0～5的整数，X表示氧原子或硫原子，Y表示邻位具有取代基的苯基、吡啶基等，包含虚线部的键表示双键或单键。