Which statement about methoprene is true?

Which statement about methoprene is true?

• A. It disturbs mosquito development from larva to adult.
• B. It has never shown resistance.
• C. It cannot be used with Bti or pyrethrins.
• D. It is the only product used in larval control.

Answer: (A)

Methoprene works as an insect growth regulator, not a direct killer. It mimics juvenile hormone, so mosquito larvae keep their juvenile traits and fail to molt properly into pupae and then adults. Because the life cycle is interrupted at a developmental stage, there are fewer adults to bite and transmit diseases. This is why the statement that methoprene disturbs development from larva to adult is the correct choice. In practice, methoprene is commonly used in larval habitats alongside other products like Bti or pyrethrins, providing a complementary approach rather than a single-method solution. It’s also important to note that there can be resistance in some mosquito populations, so the claim that it has never shown resistance isn’t accurate. And methoprene is not the only product used for larval control, since other larvicides are employed in various situations.

Methoprene works as an insect growth regulator, not a direct killer. It mimics juvenile hormone, so mosquito larvae keep their juvenile traits and fail to molt properly into pupae and then adults. Because the life cycle is interrupted at a developmental stage, there are fewer adults to bite and transmit diseases. This is why the statement that methoprene disturbs development from larva to adult is the correct choice.

In practice, methoprene is commonly used in larval habitats alongside other products like Bti or pyrethrins, providing a complementary approach rather than a single-method solution. It’s also important to note that there can be resistance in some mosquito populations, so the claim that it has never shown resistance isn’t accurate. And methoprene is not the only product used for larval control, since other larvicides are employed in various situations.