Which action is primarily used for controlling mosquito populations?

Source reduction is a fundamental strategy for controlling mosquito populations. This method involves eliminating or minimizing standing water where mosquitoes breed. By removing sources of stagnant water—such as clogged gutters, discarded tires, and water-filled containers—communities can significantly disrupt the lifecycle of mosquitoes, leading to a decrease in their populations. This intervention not only reduces the number of breeding sites but also has long-term benefits by preventing future infestations.

While other methods like pesticide application can provide immediate control, they may not always be as effective in the long term and can have negative environmental impacts. Habitat alteration can change ecological balances and might lead to other unforeseen consequences. Biological control, which involves using natural predators of mosquitoes, can be effective but often requires specific conditions to be beneficial. Source reduction stands out because it is proactive, sustainable, and minimizes reliance on chemicals.