Which one of the following insecticides is of plant origin?

Ecdysone

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Rotenone

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Parathion

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Malathion

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Solution

The correct option is B Rotenone
Ecdysone is a steroid hormone secreted by the prothoracic gland that, in its active form, stimulates metamorphosis and regulates moulting in insects.
Rotenone is an odourless, colourless chemical that is used as a broad-spectrum insecticide, piscicide (fish killer), and pesticide. It occurs naturally in the seeds and stems of several plants.
So, the answer is B.

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