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Sugarcane Mosaic




  • Sugarcane mosaic virus (SCMV) is a plant pathogenic virus of the family Potyviridae.

    The Potyviridae are a family of plant viruses. They are flexuous filamentous rod-shaped particles. Their genome is composed of positive-sense RNA which is surrounded by a protein coat made up of a single viral encoded protein called a capsid.

    Sugarcane mosaic virus (SCMV) is a plant pathogenic virus of the family Potyviridae.

    The Potyviridae are a family of plant viruses. They are flexuous filamentous rod-shaped particles. Their genome is composed of positive-sense RNA which is surrounded by a protein coat made up of a single viral encoded protein called a capsid. All induce the formation of virus inclusion bodies called cylindrical inclusions (‘pinwheels’) in their hosts. These are composed of a single protein (70 kDa) made in their hosts from a single viral genome product.

     

    Symptoms: The primary symptom of this disease is mottling of leaves. There is a general paling of young leaves, which develop into light coloured patches or streaks. In older leaves, the yellowing becomes obscure. No dwarfing of cane or appreciable reduction in yield has been noticed in the former Punjab. The first symptoms appear about 1½ month after planting.

     

    Causal agent:Sugarcane mosaic virus

     

    Disease Cycle: The disease perpetuates, either in the diseased setts or by rotooning the diseased crop. In the growing season the disease is also disseminated by insects.

     

    Control:

    1. Use of resistant varieties, e.g., Kahy, Lalri.
    2. Use of healthy setts obtained from healthy crop
    3. Abstain from ratooning.
    4. Insect control.

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