Fungicide and method of its efficient substance production

According to the invention, in the new fungicidal compositions, compounds of the formula I are used in which: A is a group (Y) n Ph (CH 2) m, in which: Y represents a halogen atom, cyano, nitro, optionally halogenated alkyl or optionally halogenated Alkoxy and preferably a halogen atom. Ph is a phenylene group, n is 0, 1, 2, 3, 4 or 5 and m is 0 or 1 and preferably 0, B is 1,2,4-triazol-1-yl or 1,3-imidazol-1-yl, R1 to R5 is hydrogen or lower alkyl, cycloalkyl, aryl, aralkyl, alkoxy, alkanoyl or aroyl and X1 and X2 preferably a halogen atom or a hydrocarbon group. Formula (I)