PROBLEM TO BE SOLVED: To provide a pest control method of plant diseases.SOLUTION: The present invention provides a plant disease pest control method that uses methyl tetraprol having excellent control effect against plant diseases, and a plant disease pest control composition containing methyl tetraprol and one or more components selected from the group consisting of a group (a): a group made of an insecticidal active ingredient, an acaricidal active ingredient and a nematicidal active ingredient; a group (b): a sterilization active ingredient; a group (c): a plant growth regulator; a group (d): a chemical damage reducing ingredient; a group (e): a synergist; a group (f): a repellent ingredient; a group (g): a molluscicidal ingredient; a group (h): an insect pheromone; a group (i): a herbicidal active ingredient; and a group (j): a microbial material.SELECTED DRAWING: NoneCOPYRIGHT: (C)2020,JPO&INPIT【課題】植物病害の防除方法を提供すること。【解決手段】本発明は、植物病害に対して優れた防除効力を有するメチルテトラプロールを用いる植物病害防除方法、並びに、メチルテトラプロールと、群(a):殺虫活性成分、殺ダニ活性成分及び殺線虫活性成分からなる群;群(b):殺菌活性成分;群(c):植物成長調整成分;群(d):薬害軽減成分;群(e):共力剤;群(f):忌避成分;群(g):殺軟体動物成分;群(h):昆虫フェロモン;群(i):除草活性成分;群(j):微生物資材、からなる群より選ばれる1以上の成分とを含有する植物病害防除組成物、を提供する。【選択図】なし