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

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

Answer: (D)

Physical pest control uses non-chemical means to prevent, deter, or remove pests, relying on things you can see or touch. Ultra-violet light is used to lure insects into a trap, which is a physical mechanism. Electric fly killers kill pests with an electric grid—again, a physical process. Rodent traps capture or kill rodents through a mechanical action. Chemical sprays, in contrast, rely on applying a chemical pesticide to affect pests, which makes them chemical pest control rather than physical. So the option that is not a physical method is chemical sprays.