Compounds of the formula (I): ##STR1## and stereoisomers thereof, wherein X is halogen, alkyl, cycloalkyl, aralkyl, aryloxyalkyl, alkenyl, alkynyl, aryl, amino, arylazo, heteroarylalkyl, heteroaryloxyalkyl, acylamino nitro, nitrile, trifluoromethyl, --OR.sup.1, SR.sup.1, --CO.sub.2 R.sup.2, --CONR.sup.3 R.sup.4, --COR.sup.5, --CR.sup.6 .dbd.NR.sup.7, --N.dbd.CR8R.sup.9, --SOR.sup.10 or --SO.sub.2 R.sup.11 ; W, Y and Z, which may be the same or different, are any of the atoms or groups listed for X above and, in addition, may be hydrogen atoms; or any two of the groups W, X, Y and Z, in adjacent positions on the phenyl ring, optionally join to form a fused ring, either aromatic or aliphatic, optionally containing one or more heteroatoms; R.sup.1 is alkyl, or cycloalkyl optionally containing a heteroatom in the cycloalkyl ring, alkenyl, acyl, aryl, heteroaryl, aralkyl or heteroarylalkyl; R.sup.2, R.sup.3, R.sup.4, R.sup.5, R.sup.6, R.sup.8, R.sup.9, R.sup.10 and R.sup.11, which may be the same or different, are hydrogen or alkyl, cycloalkyl, cycloalkylalkyl, alkenyl, aralkyl, aryl or heteroaryl; and R.sup.7 is aryl, the alkyl, cycloalkyl, aralkyl, aryloxyalkyl, alkenyl, alkynyl, aryl, amino, arylazo, heteroarylalkyl, heteroaryloxyalkyl, acylamino, acyl, and heteroaryl being optionally substituted. The compounds are useful as fungicides and as plant growth regulators.