A plant disease control agent comprising a tetrazoyloxy derivative represented by a formula (1) ** Formula ** In the formula, X represents a hydrogen atom, A represents a tetrazoyl group represented by a formula (2) ** Formula ** In the formula, Y represents a methyl group, D represents a group represented by a formula (4) ** Formula ** In the formula, Z represents (CH3) 3COCONH, R represents a hydrogen atom, a surfactant, and at least one element selected from the group consisting of fosetil, propamocarb, basic copper chloride, chlorothalonil, manzeb, cymoxanil, folpet, ciazofamid, metalaxyl, fludioxonil, tebuconazole, protioconazole, thiamethoxam, azoxystrobin and salts thereof, wherein the surfactant is a polyoxyethylene alkylphenyl ether, polyoxyethylene alkyl ether, polyoxyethylene higher fatty acid ester, polyoxyethylene sorbitan or higher fatty acid ester of polyoxyethylene ether, a sulfuric acid ester salt of polyoxyethylene alkylphenyl, alkyl naphthalene sulfonate, polycarboxylate, lignin sulfonate, condensate of alkyl naphthalene sulfonate formaldehyde or isobutylene-maleic anhydride copolymer.Un agente de control de enfermedades de las plantas que comprende un derivado de tetrazoiloxima representado por una fórmula (1)**Fórmula** En la fórmula, X representa un átomo de hidrógeno, A representa un grupo tetrazoilo representado por una fórmula (2)**Fórmula** En la fórmula, Y representa un grupo metilo, D representa un grupo representado por una fórmula (4)**Fórmula** En la fórmula, Z representa (CH3)3COCONH, R representa un átomo de hidrógeno, un tensioactivo, y al menos un elemento seleccionado entre el grupo que consiste en fosetil, propamocarb, cloruro de cobre básico, clorotalonil, manzeb, cimoxanil, folpet, ciazofamid, metalaxil, fludioxonil, tebuconazol, protioconazol, tiametoxam, azoxistrobina y sales de los mismos, en donde el tensioactivo es un polioxietilen alquilfenil éter, polioxietilen alquil éter, éster de ácido graso superior polioxietilenado,
