Pyrethroids are:

Pyrethroids are:

• A. Pyrethroid compounds found in essential oils
• B. Natural pyrethrins with no modification
• C. Synthetic versions of the natural pyrethrins
• D. Insect growth regulators

Answer: (C)

Pyrethroids are synthetic versions of the natural pyrethrins. They’re designed to mimic the insect-killing action of natural pyrethrins while offering greater stability in sunlight and water, longer residual activity, and often higher potency. Their mode of action is similar to natural pyrethrins: they disrupt insect nerve signaling by keeping voltage-gated sodium channels open, leading to rapid paralysis and death. They are not natural pyrethrins themselves (that would be the unmodified form), nor components of essential oils, nor insect growth regulators. Common examples include permethrin, cypermethrin, and deltamethrin.

Pyrethroids are synthetic versions of the natural pyrethrins. They’re designed to mimic the insect-killing action of natural pyrethrins while offering greater stability in sunlight and water, longer residual activity, and often higher potency. Their mode of action is similar to natural pyrethrins: they disrupt insect nerve signaling by keeping voltage-gated sodium channels open, leading to rapid paralysis and death. They are not natural pyrethrins themselves (that would be the unmodified form), nor components of essential oils, nor insect growth regulators. Common examples include permethrin, cypermethrin, and deltamethrin.