PROBLEM TO BE SOLVED: To provide a control agent of a plant disease that expresses a high control effect to plant diseases selected from the group consisting of a rice plant paddy wither bacterial disease (glume blight) and a rice plant paddy wither bacterial disease (seedling putrefaction disease), and a rice plant blast disease (leaf blast), a rice plant blast disease (ear blast), a barley Fusarium head blight, a barley Pyrenophora teres, a gray mold disease of fruit vegetables, a strawberry anthrax disease, a strawberry flour disease, a cucumber brown spot disease, a cucumber flour disease, a cucumber sticky disease, a water melon vine blight, a tomato leaf mold disease, an eggplant soot mold disease, a pear black spot disease, a cha ring spot disease and other filamentous fungus disease.SOLUTION: A control agent is for plant diseases selected from the group consisting of a rice plant paddy wither bacterial disease (glume blight) and a rice plant paddy wither bacterial disease (seedling putrefaction disease), and a rice plant blast disease (leaf blast ), a rice plant blast disease (ear blast), a barley Fusarium head blight, a barley Pyrenophora teres, a strawberry anthrax disease, a strawberry flour disease, a cucumber brown spot disease, a cucumber flour disease, a cucumber sticky disease, a water melon vine blight, a tomato leaf mold disease, an eggplant soot mold disease, a pear black spot disease, a cha ring spot disease and other filamentous fungus disease, and includes a nonpathogenic Erwinia ananas CTB 1206 bacterial strain (FERM AP-21274) as an active ingredient.
