Fungicides

Fungicidal compounds of the general formula (1): wherein X, Y and Z are independently H, halogen, C1-4 alkyl, halo(C1-4)alkyl, C2-4alkenyl, halo(C2-4)alkenyl, C24 alkynyl, halo(C2-4)alkynyl, C1-4 alkoxy, halo(C1-4)alkoxy, -S(O)n(C1-4)alkyl where n is 0, 1 or 2 and the alkyl group is optionally substituted with fluoro, -OS02(C1-4)alkyl where the alkyl group is optionally substituted with fluoro, cyano, nitro, C1-4 alkoxycarbonyl, -CONR'R'', -COR', -NR'COR'' or -NR'COOR''' where R' and R'' are independently H or C1-4, alkyl and R''' is C1-4 alkyl, provided that at least one of X and Z is other than H; R1 is C1-4alkyl, C2-4 alkenyl or C2-4 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 C1-4 alkylcarbonyl group, with a C1-4 alkoxycarbonyl group or with a hydroxy group; R2 is H, C1-4 alkyl, C1-4 alkoxymethyl or benzyloxymethyl in which the phenyl ring of the benzyl moiety is optionally substituted with C1-4alkoxy; R3 and R4 are independently H, C1-3 alkyl, C2-3 alkenyl or C2-3 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 R3 and R4 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 C1-4alkyl; and R5 is unsubstituted C3-4 alkyl, unsubstituted C3-6 cycloalkyl or C1-4 alkyl or C3-6 cycloalkyl in which the alkyl and cycloalkyl groups are substituted with halo, hydroxy, C1-6 alkoxy, cyano, C1-4 alkylcarbonyloxy, aminocarbonyloxy, mono- or di(C1-4)alkylaminocarbonyloxy, -S(O)''(C1-6)alkyl where n is 0, 1 or 2, triazolyl, tri(C1-4)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, C1-4 alkyl, C2-4 alkenyl, C2-4 alkynyl, C1-4alkoxy, C2-4 alkenyloxy, C2-4 alkynyloxy, halo(C1-4)alkyl, halo(C1-4)alkoxy, C1-4 alkylthio; halo(C1-4)alkylthio, hydroxy(C1-4)alkyl, C1-4 alkoxy(C1-4)alkyl, C3-6 cycloalkyl, C3-6 cycloalkyl(C1-4)alkyl, phenoxy, benzyloxy, benzoyloxy, cyano, isocyano, thiocyanato, isothiocyanato, nitro, -NR-R', -