First Report of Leveillula cylindrospora Conidial State on Bassia indica

The conidial stage of Leveillula cylindrospora U. Braun has been found on Bassia indica. The fungus is described, illustrated and discussed. The isolated fungus incited powdery mildew symptoms on the inoculated B. indica leaves, which proved Koch's postulates. It is, to our knowledge, the first formal report of a powdery mildew disease on B. indica in Egypt and the world.