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    Question

    Under what conditions do Phytophthora root and stem rots

    occur?
    A When the soil is too dry Correct Answer Incorrect Answer
    B When the temperature is too high Correct Answer Incorrect Answer
    C When the soil is too wet and the temperature is between 15 and 23°C Correct Answer Incorrect Answer
    D When the soil is too alkaline Correct Answer Incorrect Answer

    Solution

    Phytophthora root and stem rots cause damage to their hosts in nearly every part of the world where the soil becomes too wet for the good growth of susceptible plants and the temperature remains fairly low, i.e., between 15 and 23°C.

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