Which of the following is NOT an example of a physical pest control method?

• A. Ultra-violet
• B. Electric fly killers
• C. Chemical sprays
• D. Rodent traps

Answer: (C)

Pest control methods can be broadly split into physical (non-chemical) and chemical approaches. Physical methods rely on barriers, traps, lights, or other non-chemical means to prevent or remove pests. Examples include UV light traps, devices like electric fly killers, and rodent traps—they work by attracting, trapping, or killing pests without introducing chemical substances.

Chemical sprays rely on pesticides to kill or deter pests, which makes them chemical control rather than physical. That’s why the option describing a chemical pesticide spray is not a physical pest control method.