Use of a regulatory agent for the wet rot of plants, said regulatory agent containing, as an active ingredient, a compound that has no antibacterial activity against Erwinia carotovora but that has a regulatory activity against fungi on the ground surface, in which the compound with the regulatory activity is at least one selected from the group consisting of (E) -2- {2- [6- (2-cyanophenoxy) pyrimidin-4-yloxy] phenyl} -3-methyl methoxyacrylate, (E) - methoxyimino [2- (o-tolyloxymethyl) phenyl] methyl acetate (E) -4-chloro-alpha, alpha, alpha-trifluoro-N- [1-imidazol-1-yl-2-propoxyethylidene] -o-toluidine, 4-Chloro-2-cyano-N, N-dimethyl-5-p-tolylimidazol-1-sulfonamide, 3 - [(3-bromo-6-fluoro-2-methyl-1H-indole-1-yl) sulfonyl] -N, N-dimethyl-1H-1,2,4-triazol-1-sulfonamide, 4,4 '- (o-phenylene) bis (3-thioalophanate) dimethyl, (RS) -N- [2- ( 1,3-dimethylbutyl) -3-thienyl] -1-methyl-3- (trifluoromethyl) -1H-pyrazol-4-carboxamide, 2-chloro-N- (4'-chlorobiphenyl-2-yl) nicotinamide, 2 ' , 4-dichloro-alpha, alpha, alpha-t Rifluoro-4'-nitro-m-toluenesulfone-anilide, 2,4,5,6-tetrachloro-1,3-benzene-dicarbonitrile, N- (3,5-dichlorophenyl) -1,2-dimethylcyclopropane-1,2 -dicarboximide, 3- (3,5-dichlorophenyl) -N-isopropyl-2,4-dioxoimidazolidino-1-carboxamide, 4- (2,2-difluoro-1,3-benzodioxol-4-yl) pyrrole-3- carbonitrile, N- (4-methyl-6-prop-1-inylpyrimidin-2-yl) aniline, and 1,1'-iminodi (octamethylene) diguanidinium-tris (alkylbenzenesulfonate).Uso de un agente regulador para la podredumbre húmeda de plantas, conteniendo dicho agente regulador, como ingrediente activo, un compuesto que no tiene actividad antibacteriana contra Erwinia carotovora pero que tiene una actividad reguladora contra hongos en la superficie del terreno, en que el compuesto con la actividad reguladora es al menos uno seleccionado entre el grupo que consiste en (E)-2-{2-[6-(2-cianofenoxi)pirimidin-4-iloxi]fenil}-3-metoxiacrilato de metilo, (E)-metoxiimino[2-(o-toliloximetil)fenil]acetato de metilo (E)-4-c
