Fungicides for the control of take-all disease of plants

摘要

A compound, composition, and method for controlling Take-all disease of plants by applying to the seed prior to planting, a fungicide of the formula: f an aromatic ring which is pyridine; R and n are defined herein; A is selected from the group consisting of -C(O)-SR3, -NH-C(X)R4, -C(=NR3)-XR7, and -C(X)-amine wherein the amine is substituted with with an alkylaminocarbonyl and a hydrogen or wherein the amine has a first and a second amine substituent defined herein; B is -Wm-Q(R2)3 or selected from 0-tolyl, 1-naphthyl, 2-naphthyl, and 9-phenanthryl, each optionally substituted with halogen or R4; Q is C, Si, Ge, or Sn; W is -C(R3)pH(2-p)-; or when Q is C, W may also be selected from -N(R3)mH(1-m)-, -S(O)p-, and -O-; X is O or S; n is 0, 1, 2, or 3; m is 0 or 1; p is 0, 1, or 2; each R2 is independently selected from alkyl, alkenyl, alkynyl, cycloalkyl, cycloalkenyl and phenyl, each optionally substituted with R4 or halogen; and wherein, when Q is C, R2 may also be selected from halo, alkoxy, alkylthio, alkylamino, and dialkylamino; or wherein two R2 groups may be combined to form a cyclo group with Q which is 1-methylcyclopropyl, 1-methylcyclobutyl, 1-methylcyclopentyl, or 1-methylcyclohexyl; R3 is C1-C4 alkyl; R4 is C1-C4 alkyl, haloalkyl, alkoxy, alkylthio, alkylamino, or dialkylamino; and R7 is C1-C4 alkyl, haloalkyl, or phenyl, optionally substituted with halo, nitro, or R4; or an agronomic salt thereof.