Fungicidal compounds of the general formula (1): wherein X, Y and Z are independently H, halogen, C.sub.1-4 alkyl, halo(C.sub.1-4)alkyl, C.sub.2-4alkenyl, halo(C.sub.2-4)alkenyl, .sub.C24 alkynyl, halo(C.sub.2-4)alkynyl, C.sub.1-4 alkoxy, halo(C.sub.1-4)alkoxy, --S(O).sub.n(C.sub.1-4)alkyl where n is 0, 1 or 2 and the alkyl group is optionally substituted with fluoro, --OS0.sub.2(C.sub.1-4)alkyl where the alkyl group is optionally substituted with fluoro, cyano, nitro, C,.sub.1-4 alkoxycarbonyl, --CONR'R'', --COR', --NR'COR'' or --NR'COOR''' where R' and R'' are independently H or C.sub.1-4, alkyl and R''' is C.sub.1-4 alkyl, provided that at least one of X and Z is other than H; R.sub.1 is C.sub.1-4 alkyl, C.sub.2-4 alkenyl or C.sub.2-4 alkynyl in which the alkyl, alkenyl and alkynyl groups are optionally substituted on their terminal carbon atom with one, two or three halogen atoms, with a cyano group, with a C.sub.1-4 alkylcarbonyl group, with a C.sub.1-4 alkoxycarbonyl group or with a hydroxy group; R.sub.2 is H, C.sub.1-4 alkyl, C.sub.1-4 alkoxymethyl or benzyloxymethyl in which the phenyl ring of the benzyl moiety is optionally substituted with .sub.C1-4 alkoxy; R.sub.3 and R.sub.4 are independently H, C.sub.1-3 alkyl, C.sub.2-3 alkenyl or C.sub.2-3 alkynyl provided that both are not H and that when both are other than H their combined total of carbon atoms does not exceed 4, or R.sub.3 and R.sub.4 join with the carbon atom to which they are attached to form a 3 or 4 membered carbocyclic ring optionally containing one 0, S or N atom and optionally substituted with halo or C.sub.1-4 alkyl; and R.sub.5 is unsubstituted C.sub.3-4 alkyl, unsubstituted C.sub.3-6 cycloalkyl or C.sub.1-4 alkyl or C.sub.3-6 cycloalkyl in which the alkyl and cycloalkyl groups are substituted with halo, hydroxy, C.sub.1-6 alkoxy, cyano, C.sub.1-4 alkylcarbonyloxy, aminocarbonyloxy, mono- or di(C.sub.1-4)alkylaminocarbonyloxy, --S(O)''(C.sub.1-6)alkyl where n is 0, 1 or 2, triazolyl, tri(C.sub.1-4)alkylsilyloxy, optionally substituted phenoxy, optionally substituted thienyloxy, optionally substituted benzyloxy or optionally substituted thienyl-methoxy, in which the optionally substituted phenyl and thienyl rings of phenoxy, thienyloxy, benzyloxy and thienylmethoxy are optionally substituted with one, two or three substituents selected from halo, hydroxy, mercapto, C.sub.1-4 alkyl, C.sub.2-4 alkenyl, C.sub.2-4 alkynyl, .sub.C1-4 alkoxy, C.sub.2-4 alkenyloxy, C.sub.2-4 alkynyloxy, halo(C.sub.1-4)alkyl, halo(C.sub.1-4)alkoxy, C.sub.1-4 alkylthio; halo(C.sub.1-4)alkylthio, hydroxy(C.sub.1-4)alkyl, C.sub.1-4 alkoxy(C.sub.1-4)alkyl, C.sub.3-6 cycloalkyl, C.sub.3-6 cycloalkyl(C.sub.1-4)alkyl, phenoxy, benzyloxy, benzoyloxy, cyano, isocyano, thiocyanato, isothiocyanato, nitro, --NR--R', --NHCOR.sup.m, --NHCONR.sup.mR'', --CONRmR'', --S02R.sup.m, --OS02R.sup.m, --COR.sup.M, --CR'.dbd.NR'' or --N.dbd.CR.sup.mR'', in which R''' and R'' are independently hydrogen, C1-4 alkyl, halo(C.sub.1-4)alkyl, C1-4 alkoxy, halo(C.sub.1-4)alkoxy, C.sub.1-4 alkylthio, C.sub.3-6 cycloalkyl, C.sub.3-6 cycloalkyl(C.sub.1-4)alkyl, phenyl or benzyl, the phenyl and benzyl groups being optionally substituted with halogen, C.sub.1-4 alkyl or C.sub.1-4 alkoxy ##STR00001##