[Problem] To provide a strain not pathogenic to plants which exhibits a stable bacterial plant disease control effect at real crop production sites and which can be safely used as a biological pesticide, and to provide a bacterial plant disease control agent using said strain. [Solution] By using, as an active component, live bacteria, or a culture containing said live bacteria, of a bacterial strain of the genus Mitsuaria, which is not conventionally know to have a bacterial plant disease control effect, it is possible to provide a bacterial plant disease control agent such as a vegetable wilt disease control agent or a surface rot control agent.
