Conventional insecticides kill mosquitoes at which life stages?

• A. At any instar level
• B. Only at early instars
• C. Only at the pupal stage
• D. Only on adults

Answer: (A)

Conventional mosquito insecticides span both larval and adult control, so they can affect mosquitoes across different life stages. Larvicides are designed to kill larvae in the water, and these products are effective regardless of which larval instar the mosquito is in, since the larvae remain vulnerable while feeding through early, middle, and late instars. Adults can be knocked down by adulticides when they’re present, but the larval stage isn’t limited to a single instar. That broad activity across the larval development stages is why the best answer is that conventional insecticides can kill mosquitoes at any instar level.