Covering water storage as a vector-control measure primarily prevents what?

Covering water storage as a vector-control measure primarily prevents what?

• A. It increases water storage capacity.
• B. Covering water storage primarily prevents mosquitoes from accessing water for oviposition.
• C. It reduces water temperature, not affecting mosquitoes.
• D. It invites mosquitoes to lay eggs on the surface.

Answer: (B)

Blocking access to standing water is the key idea. Many container-breeding mosquitoes lay eggs on the surface of water in storage containers around homes. When a lid or cover is tight and intact, adult females can’t reach the water to oviposit, so the eggs aren’t laid and new larvae aren’t produced. Over time, this reduces the number of mosquitoes in the area because the life cycle is interrupted at the egg stage. It’s not about increasing how much water you can store, it doesn’t primarily change water temperature in a way that affects mosquitoes, and it definitely doesn’t invite eggs to be laid.

Blocking access to standing water is the key idea. Many container-breeding mosquitoes lay eggs on the surface of water in storage containers around homes. When a lid or cover is tight and intact, adult females can’t reach the water to oviposit, so the eggs aren’t laid and new larvae aren’t produced. Over time, this reduces the number of mosquitoes in the area because the life cycle is interrupted at the egg stage. It’s not about increasing how much water you can store, it doesn’t primarily change water temperature in a way that affects mosquitoes, and it definitely doesn’t invite eggs to be laid.