This fungicide for agricultural and horticultural use includes a compound represented by formula (I) (in the formula, X represents a halogen group, or the like.； n represents any integer of 0 to 4； when n is 2 or more, 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 formulae, * represents a binding site； Y1 is N or CR1； Y2 is N or CR2； Y3 is N or CR3； Y4 is N or CR4, at least two of Y1 to Y4 are not nitrogen atoms； R1, R2, R3, and R4, each independently represent a hydrogen atom, a substituted or unsubstituted C1-6 alkyl group, or the like； R represents a substituted or unsubstituted C1-6 alkyl group or the like； 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.
