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Fungal disease which causes head blight and occurs mainly in the warm regions. After heading, the whole infected heads are covered with gray to black colony. Later the fungus fasten each head spike and the whole head looks grayish black moldy. White colony appears on the surface of the leaf like the
stripe along the leaf vein. It is reported that the causal organism is infected in the entire plant as an
epiphyte and the infected plant becomes resistant to insects such as grasshopper.
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Fungal disease which causes head blight and occurs mainly in the warm regions. After heading, the whole infected heads are covered with gray to black colony. Later the fungus fasten each head spike and the whole head looks grayish black moldy. White colony appears on the surface of the leaf like the stripe along the leaf vein. It is reported that the causal organism is infected in the entire plant as an epiphyte and the infected plant becomes resistant to insects such as grasshopper. |
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The disease occurs in Hokuriku and Kanto districts, the central Japan. Sori are produced at ovaries in flowers, and infected flowers show hypertrophy covered with peridium. At first, they are green on the surface, then gradually swollen and turn brown. Approximately 2 mm in size, later the surface disrupts and exposes smut spores (chlamydospores) and then they scatter by wind. Asexual stage is Pseudozyma tsukubaensis (=Candida tsukubaensis) known as an epiphyte on gramineous plants and a producer of erythritol, oligosaccharide. |
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