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    Question

    Economic threshold level is always:

    A Lower than economic injury level Correct Answer Incorrect Answer
    B Equal to economic injury level Correct Answer Incorrect Answer
    C More than economic injury level Correct Answer Incorrect Answer
    D Reached when severe damage is done Correct Answer Incorrect Answer
    E None of the above Correct Answer Incorrect Answer

    Solution

    An economic threshold (ET) is defined as: ‘the pest population likely to cause damage equal in value to the cost of control (pesticide plus application).’ Such a population is known as the ‘critical’ or ‘break even’ population. It is always lower than economic injury level.

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