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    Question

    Which of the following is the cause of black heart of

    potato?
    A Copper deficiency Correct Answer Incorrect Answer
    B Boron deficiency Correct Answer Incorrect Answer
    C Attack by leafhoppers Correct Answer Incorrect Answer
    D Phosphorus deficiency Correct Answer Incorrect Answer
    E Oxygen deficiency Correct Answer Incorrect Answer

    Solution

    Black heart occurs primarily in storage when the tubers do not receive enough oxygen. Blackening of the tuber center follows acute oxygen deficiency associated with either low temperature in confined storage or high field soil temperatures.

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