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      Question

      Which of the following substances is not classified as

      an insect growth regulator (IGR)?
      A Synthetic pyrethroid Correct Answer Incorrect Answer
      B Juvenile hormone analogue Correct Answer Incorrect Answer
      C Chitin inhibitor Correct Answer Incorrect Answer
      D Ecdysteroid Correct Answer Incorrect Answer
      E Methoprene Correct Answer Incorrect Answer

      Solution

      Synthetic pyrethroids are neurotoxic insecticides, not IGRs. The others influence insect development processes like molting and growth.

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