Replacing the weather stripping on a door and patching screens are two examples of which type of mosquito control?

• A. Cultural.
• B. Chemical.
• C. Mechanical.
• D. Biological.

Answer: (C)

Mechanical controls rely on physical barriers to block mosquitoes from reaching people. Replacing weather stripping on a door and patching screens fit this idea because both actions physically seal openings that mosquitoes could use to enter the home, preventing bites without killing insects or using chemicals. These are not about changing people’s behavior or habitats (that would be cultural), nor about applying pesticides or toxins (chemical), nor about introducing organisms to reduce mosquito populations (biological). By strengthening barriers, you reduce exposure directly through a non-chemical, non-biological method.