PROBLEM TO BE SOLVED: To provide: a Sigatoka disease control agent that is for controlling the Sigatoka disease which attacks Musaceae species, especially banana and a control method of the Sigatoka disease.SOLUTION: There is provided a Sigatoka disease control agent that is a control agent which includes isoprothiolane (diisopropyl 1,3-dithiolane-2-ylidene malonate) as an active ingredient, and which is used for spraying treatment or applying treatment or the like to a leaf blade part or a pseudstem part of a banana parent pseudostem root attacked by the Sigatoka disease or estimated to be attacked by the Sigatoka disease, in order to control the Sigatoka disease that attacks Musaceae species, especially banana, and a control method of the Sigatoka disease is provided.COPYRIGHT: (C)2014,JPO&INPIT【課題】バショウ科植物、特にバナナに発生するシガトカ病を防除するためのシガトカ病防除剤及びその防除方法を提供する。【解決手段】イソプロチオラン(ジイソプロピル1,3-ジチオラン-2-イリデンマロネート)を有効成分とする防除剤で、バショウ科植物、特にバナナに発生するシガトカ病を防除するために、シガトカ病が発生している又は発生が予測されるバナナ親偽茎株の葉身部乃至偽茎部に散布処理又は塗布処理等するためのシガトカ病防除剤及び防除方法。【選択図】なし