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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 from Hokkaido to Kyushu, throughout Japan. At first, purplish brown to brown and small spots are produced on the leaves. They enlarge gradually and become large lesions with necrotic surroundings. If occurring severely, it can kill the whole plants, the pathogen is, therefore, suggested to be used as a biotic herbicide. Pre-inoculation of the pathogen to rice could induce suppression of the rice blast disease.
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The disease occurs mainly in central and northern 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 3-4 mm in size, and agglutinated smut sores (chlamydospores) are produced inside without showing powdery appearance. Asexual stage is Pseudozyma antarctica showing high surfactant ability and often isolated as an epiphyte on gramineous plants. It is known to degrade certain biodegradable plastics, producing esterase. |
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It occurs throughout Japan including Hokkaido, the northmost. Sori are produced in flower spikelets, leaf sheaths and inside of culms. Infected parts show hypertrophy and gradually swollen into round shape covered by peridium. Approximately 2-3 mm in size, later the surface disrupts and exposes smut spores (chlamydospores) and then they scatter by wind. The fungus shows strong pathogenicity to barnyard grass by inoculation and proposed as a bioherbicide of the grass. |
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@Important disease of southern crabgrass throughout Japan. The disease produces grayish white and spindle-shaped lesions with purplish brown border in leaves. The causal organism cuases same disease in corn seedlings, but can not infect rice and other grasses. Microconidia of phialo-tye sometimes produced on the artificial media. |
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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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