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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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