PROBLEM TO BE SOLVED: To provide a simple and inexpensive method for preventing disease in transplanted rice having long residual effect in rice paddies, wherein the amount of at least one agrochemical is remarkably reduced compared with that of the conventional nursery-box treatment.SOLUTION: The method for preventing disease in transplanted rice in rice paddies is characterized in that the composition comprising isotianil is adhered to rice seeds before they are sowed in nursery boxes.COPYRIGHT: (C)2013,JPO&INPIT【課題】薬量を従来の育苗箱処理より格段に減らし、簡便かつ安価に、本田での長期残効を有する移植苗病害防除方法を提供する。【解決手段】育苗箱への播種前の稲籾に、イソチアニルを含む薬剤を付着させることを特徴とする、本田における移植稲の病害を防除する方法。【選択図】なし