A compound represented by formula (I) or a salt thereof.In formula (I), R1 and R4 each independently represent a hydrogen atom, or an unsubstituted or substituted C1 to C6 alkyl group or the like. R2 represents a hydrogen atom, or an unsubstituted or substituted C1 to C6 alkyl group or the like. R3 represents an unsubstituted or substituted C1 to C6 alkyl group or the like. R5 represents a C1 to C6 haloalkyl group or the like. G represents an oxygen atom or a sulfur atom. R6 and R7 each independently represent a hydrogen atom, or an unsubstituted or substituted C1 to C6 alkyl group or the like. n represents 0 or 1. R8 and R9 each independently represent a hydrogen atom, or an unsubstituted or substituted C1 to C6 alkyl group. Ar represents an unsubstituted or substituted C6 to C10 aryl group or the like.
