NITROGENATED HETEROCYCLIC COMPOUND AND AGRICULTURAL OR HORTICULTURAL FUNGICIDE An agricultural or horticultural fungicide contains as an active ingredient thereof at least one compound selected from the group consisting of nitrogenated heterocyclic compounds represented by formula (I) (wherein, R represents a group represented by CR1R2R3 or a cyano group, R1 to R3 represent hydrogen atoms, alkyl groups or hydroxyl groups, or the like, X1 represents a halogeno group or the like, m represents an integer of 0 to 5, X2 represents a halogeno group or the like, n represents an integer of 0 to 3, B represents a carbon atom or a nitrogen atom, D represents a 5- to 7-membered hydrocarbon ring, and A1 to A4 represent carbon atoms or nitrogen atoms, provided that A1 to A4 do not all represent carbon atoms when B represents a carbon atom) and salts thereof.
