This fungicide for agricultural and horticultural use includes a compound represented by formula (I) (in the formula, X represents a halogen group, etc.； n represents any integer of 0-4； when n is 2 or higher, X may be the same or different； L represents a single bond or a substituted or unsubstituted C1-6 alkylene group； Q is a group represented by formula (Q-1) or formula (Q-2) (in the formulas, * represents a binding site； Y1 is N or CR1； Y2 is N or CR2； Y3 is N or CR3； Y4 is N or CR4； two or more among Y1-Y4 are not nitrogen atoms； R1, R2, R3, and R4 each independently represent a hydrogen atom or a substituted or unsubstituted C1-6 alkyl group, etc.； R represents a substituted or unsubstituted C1-6 alkyl group, etc.； G represents a substituted or unsubstituted C1-6 alkylene group； T represents a substituted or unsubstituted C1-6 alkylene group； Y5 is N or CH)) or a salt thereof.
