Which one of the following is the example of insect hormone?

Solution (By Examveda Team)

Endosulphan is not an insect hormone. It is a broad-spectrum insecticide that is used to control a variety of pests in agriculture. It acts as a poison, targeting the nervous system of insects, but it is not a naturally occurring hormone in insects.

Ecdysone is a natural insect hormone. It is a steroid hormone that regulates molting and metamorphosis in insects. Ecdysone is responsible for initiating the process of molting, where the insect sheds its old exoskeleton and forms a new one. It is crucial for the growth and development of insects.

Chitin is not an insect hormone. It is a structural polysaccharide found in the exoskeletons of insects and other arthropods. Chitin provides rigidity and protection to the insect's body but does not play a hormonal role in the insect's physiology.

Allethrin is also not an insect hormone. It is a synthetic pyrethroid insecticide commonly used in household insect repellents, such as mosquito coils. It works by disrupting the nervous system of insects, leading to their death, but it is not involved in their growth or development like a hormone would be.

Conclusion:
Ecdysone is the only option that is an example of an insect hormone, playing a key role in molting and metamorphosis, making it the correct answer.