In consideration of the fact that control agents against leaf blotch are small in number among control agents against cereal diseases and are not sufficiently effective, the present invention is intended to provide a novel means and method for controlling leaf blotch for stable cereal production. Provided is a method for controlling leaf blotch of cereals, which method is characterized by applying an effective dose of fluoroimide to a cereal plant, soil in the vicinity of the cereal plant grown, or a seed of the cereal plant.
