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    Question

    Weed biotype is resistance to two or more herbicide due

    to presence of single resistance mechanism is referred as:
    A Multiple resistance Correct Answer Incorrect Answer
    B Cross resistance Correct Answer Incorrect Answer
    C Cris cross resistance Correct Answer Incorrect Answer
    D None of the above Correct Answer Incorrect Answer

    Solution

    Cross-resistance is defined as the ability of a weed population to express resistance to more than one herbicide. It may arise without the weed population ever being exposed to one of the herbicides. 

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