PROBLEM TO BE SOLVED: To provide a composition having excellent potency to control plant disease and a plant disease control method.SOLUTION: There are provided a plant disease control composition containing a pyridazine compound represented by the following formula (1) and one or more kind of 5-fluorouracil compound selected from a following group (A) and a plant disease control method including a process for treating plants or soil where plants are cultivated with the composition. X represents F or H. Group (A):4-amino-5-fluoro-1-tosilpyrimidine-2(1H)-one, 5-fluoro-4-imino-3-methyl-1-tosil-3,4-dihydropyrimidine-2(1H)-one and 5-fluoro-3-methyl-4-(methylimino)-1-tosil-3,4-dihydropyrimdine-2(1H)-one.SELECTED DRAWING: NoneCOPYRIGHT: (C)2017,JPO&INPIT【課題】植物病害に対する優れた防除効力を有する組成物及び植物病害防除方法の提供。【解決手段】下記式(1)で示されるピリダジン化合物と、下記群(A)より選ばれる1種以上の5-フルオロウラシル化合物とを含有する植物病害防除組成物、及び該組成物を植物または植物を栽培する土壌に処理する工程を含む植物病害防除方法。〔式中、Xは、FまたはHを表す。〕群(A):4-アミノ-5-フルオロ-1-トシルピリミジン-2(1H)-オン、5-フルオロ-4-イミノ-3-メチル-1-トシル-3,4-ジヒドロピリミジン-2(1H)-オン及び5-フルオロ-3-メチル-4-(メチルイミノ)-1-トシル-3,4-ジヒドロピリミジン-2(1H)-オンからなる群。【選択図】なし
