8th Class Science Crop Production and Management Question Bank Crop Production and Microorganisms

  • question_answer Identify the disease and its causative agent on the basis of given symptoms.
    (i) Small yellow spots formed on upper and lower layer of leaves.
    (ii) Diseased area dies leaving hole.
    (iii) Spots appearing on twigs and fruits

    A) Yellow vein mosaic ? Virus

    B) Citrus canker ? Bacteria

    C) Rust of wheat - Fungus

    D) Wilt of tomato ? fungus

    E) None of these

    Correct Answer: B


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