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  • ICAR and TNAU E-Course Summarized

    Summarized Notes
  • What bacterial disease commonly affects rice plants?

    Question: What bacterial disease commonly affects rice plants?

    Options:

    Brown leaf spot
    Leaf blight
    Blast
    False smut

    -✅Explanation: Bacterial leaf blight, caused by the bacterium Xanthomonas oryzae pv. oryzae, is a significant disease of rice. Symptoms include long, water-soaked lesions on leaves that extend down the leaf blade in later stages.

    📌Other Options Explanations:
    -Brown leaf spot: A fungal disease of rice
    -Blast: A fungal disease of rice caused by the fungus Magnaporthe oryzae.
    -False smut: A fungal disease of rice caused by the fungus Ustilaginoidea virens.

    🔑Key Points:
    -Rice bacterial blight, also called bacterial blight of rice, is a deadly bacterial disease caused due to Xanthomonas oryzae.
    -It is one of the most important diseases of rice in most rice growing countries.
    -In this disease, yellowish-green spots are seen on both sides of the leaves.
    -Vascular bundles also get blocked due to bacterial growth.
    -Severely infected leaves tend to dry quickly and there is a loss in grain yield may be up to 60%.

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