This agricultural and horticultural chemical contains multiple active ingredients, one of which is the azole derivative represented by general formula (I). This agricultural and horticultural chemical can be used as a plant disease control agent that allows a reduced amount of the active ingredients. (In the formula, R1 represents an alkyl group with 1-6 carbon atoms, R2 represents a hydrogen atom, an alkyl group with 1-3 carbon atoms, or an alkenyl or alkynyl group with 2-3 carbon atoms, A represents a nitrogen atom or a methine group, Y1 represents a halogen atom, and n represents 0 or 1.)
