A method of controlling Take-All disease of plants by applying a fungicide of the formula ##STR1## wherein Z.sub.1 and Z.sub.2 are C and are part of an aromatic ring which is .[.benzothiophene.]..Iadd.thiophene.Iaddend.; andA is .[.selected from.]. --C(X)-amine .[.wherein the amine is an unsubstituted, monosubstituted or disubstituted amino radical.]..Iadd.wherein the amine is a monosubstituted or a disubstituted amine, wherein one of the substituents has a cyclic moiety, said cyclic moiety which is chosen from the group consisting of thienyl, furanyl, and a non-heterocyclic substituent, wherein when the amine is disubstituted, the second substituent is a non-cyclic substituent.Iaddend., --C(O)--SR.sub.3, --NH--C(X)R.sub.4, .[.and.]. .Iadd.or .Iaddend.--C(.dbd.NR.sub.3)--XR.sub.7 ;B is --W.sub.m --Q(R.sub.2).sub.3 or selected from .[.O-tolyl.]..Iadd.o-tolyl.Iaddend., 1-naphthyl, 2-naphthyl, and 9-phenanthryl, each optionally substituted with halogen or R.sub.4 ;Q is C, Si, Ge, or Sn;W is --C(R.sub.3).sub.p H.sub.(2-p) --; or when Q is C, W is selected from .[.--C(R.sub.3).sub.p H.sub.(2-p),.[..Iadd.--C(R.sub.3).sub.p H.sub.(2-p) --.Iaddend., --N(R.sub.3).sub.m H.sub.(1-m) --, .[.--S(O)p--,.]. .Iadd.--S(O).sub.p --, .Iaddend.and --O--,X is .[.0.]. .Iadd.O .Iaddend.or S;n is .[.0, 1, 2, or 3.]..Iadd.2.Iaddend.;m is 0 or 1;p is 0, 1, or 2;.Iadd.wherein the two R groups are combined with the thiophene ring to form a fused ring which is benzothiophene.Iaddend.; each R and R.sub.2 is independently defined herein;R.sub.3 is C.sub.1 -C.sub.4 alkyl;R.sub.4 is C.sub.1 -C.sub.4 alkyl, haloalkyl, alkoxy, alkylthio, alkylamino, or dialkylamino; andR.sub.7 is C.sub.1 -C.sub.4 alkyl, haloalkyl, or phenyl, optionally substituted with halo, nitro, or R.sub.4 ;or an agronomic salt thereof.