Lowering humidity is an example of which type of pest control?

• A. Chemical control
• B. Biological control
• C. Cultural control
• D. Environmental/physical control

Answer: (D)

Lowering humidity is about changing the pest’s living conditions rather than using chemicals or releasing living organisms. This fits environmental/physical control because it directly modifies the environment to make it less favorable for pests. Many pests, like dust mites and mold producers, need a certain level of moisture to thrive and reproduce; by using dehumidifiers, improving ventilation, sealing leaks, and reducing moisture, you disrupt their habitat and reduce pest problems without pesticides or biological agents. This approach differs from chemical control (which relies on pesticides) and biological control (which uses natural enemies), and it’s also distinct from cultural practices like sanitation, since the primary action is altering moisture conditions in the environment itself.