Why are larval development sites important in mosquito control?

• A. Because they are where larvae are confined and concentrated and can be easily controlled
• B. Because they attract predators
• C. Because adults breed there
• D. Because they are only seasonal.

Answer: (A)

Larval development sites matter because mosquitoes spend their entire immature life cycle in water, so these habitats gather larvae into a limited number of predictable spots. Targeting control efforts at these sites is highly efficient: you can apply larvicides, remove standing water, or use biological controls to stop larvae from becoming adults. By interrupting development at this stage, you dramatically reduce the number of mosquitoes that emerge later. Other ideas—like predators being the main reason, adults breeding there, or seasonality—don’t capture the essential leverage: stopping the population before it reaches the adult stage in concentrated, manageable habitats.