PROBLEM TO BE SOLVED: To provide a new control application of a composition comprising copper sulfate and sodium bicarbonate. SOLUTION: An Oryza sativa bacterial disease injury-controlling agent for seed treatment( the disease injuries include seedling rot caused by grain rot-related bacteria and damping-off caused by relevant bacteria ) comprises copper sulfate and sodium bicarbonate as active ingredients. A method for controlling the Oryza sativa bacterial disease injuries comprising treating Oryza sativa seeds with the respective effective amounts of copper sulfate and sodium bicarbonate is also provided. COPYRIGHT: (C)2004,JPO