Fungicidal compounds having the general formula (1): formula (1) wherein W, Z and one of X and Y are N and the other one of X and Y is CR 8 ; R 8 is H, halo, C 1-4 alkyl, C 1-4 alkoxy, C 1-4 alkylthio or halo(C 1-4 )alkyl; R and R 2 are independently H, halo, C 1-8 alkyl, C 1-8 alkoxy, C 1-8 alkylthio, C 2-8 alkenyl, C 2-8 alkynyl, cyano or NR 3 R 4 , provided that at least one of R and R 2 is NR 3 R 4 ; R 1 is halo, C 1-8 alkyl, C 2-8 alkenyl, C 2-8 alkynyl, C 3-8 cycloalkyl, C 3-8 cycloalkyl(C 1-6 )­-alkyl, C 1-8 alkoxy, C 1-8 alkylthio, aryl, aryloxy, arylthio, heteroaryl, heteroaryloxy, heteroarylthio, aryl(C 1-4 )alkyl, aryl(C 1-4 )alkoxy, heteroaryl(C 1-4 )alkyl, heteroaryl­(C 1-4 )alkoxy, aryl(C 1-4 )alkylthio, heteroaryl(C 1-4 )alkylthio, morpholino, piperidino or pyrrolidino; R 3 and R 4 are independently H, C 1-8 alkyl, C 2-8 alkenyl, C 2-8 alkynyl, aryl, aryl(C 1-8 )­- alkyl, C 3-8 cycloalkyl, C 3-8 cycloalkyl(C 1-6 )alkyl, heteroaryl, heteroaryl(C 1-8 )alkyl, NR 5 R 6 , provided that not both R 3 and R 4 are H or NR 5 R 6 , or R 3 and R 4 together form a C 3-7 alkylene or C 3-7 alkenylene chain optionally substituted with one or more C 1-4 alkyl or C 1-4 alkoxy groups, or, together with the nitrogen atom to which they are attached, R 3 and R 4 form a morpholine, thiomorpholine, thiomorpholine S-oxide or thiomorpholine S-dioxide ring or a piperazine or piperazine N -(C 1-4 )alkyl (especially N -methyl) ring; and R 5 and R 6 are independently H, C 1-8 alkyl, C 2-8 alkenyl, C 2-8 alkynyl, aryl, aryl(C 1-8 )­alkyl, C 3-8 cycloalkyl, C 3-8 cycloalkyl(C 1-6 )alkyl, heteroaryl or heteroaryl(C 1-8 )alkyl; any of the foregoing alkyl, alkenyl, alkynyl or cycloalkyl groups or moieties (other than for R 8 ) being optionally substituted with halogen, cyano, C 1-6 alkoxy, C 1-6 alkylcarbonyl, C 1-6 alkoxycarbonyl, C 1-6 haloalkoxy, C 1-6 alkylthio, tri(C 1-4 )alkylsilyl, C 1-6 alkylamino or C 1-6 dialkylamino, any of the foregoing morpholine, thiomorpholine, piperidine, piperazine and pyrrolidine rings being optionally substituted with C 1-4 alkyl (especially methyl), and any of the foregoing aryl or heteroaryl groups or moieties being optionally substituted with one or more substituents selected from halo, hydroxy, mercapto, C 1-6 alkyl, C 2-6 alkenyl, C 2-6 alkynyl, C 1-6 alkoxy, C 2-6 alkenyloxy, C 2-6 alkynyloxy, halo(C 1-6 )alkyl, halo(C 1-6 )alkoxy, C 1-6 alkylthio, halo(C 1-6 )alkylthio, hydroxy(C 1-6 )alkyl, C 1-4 alkoxy(C 1-6 )alkyl, C 3-6 cycloalkyl, C 3-6 cycloalkyl(C 1-4 )alkyl, phenoxy, benzyloxy, benzoyloxy, cyano, isocyano, thiocyanato, isothiocyanato, nitro, -NR"'R"", NHCOR"', -NHCONR"'R"", -CONR"'R"", -SO 2 R"', -OSO 2 R"', -COR"', -CR"'=NR"" or -N=CR "'R"", in which R"' and R"" are independently hydrogen, C 1-4 alkyl, halo-(C 1-4 )alkyl, C 1-4 alkoxy, halo(C 1-4 )alkoxy, C 1-4 alkylthio, C 3-6 cycloalkyl, C 3-6 cycloalkyl(C 1-4 )alkyl, phenyl or benzyl, the phenyl and benzyl groups being optionally substituted with halogen, C 1-4 alkyl or C 1-4 alkoxy.