Which of the following is classified as a mechanical pest control device?

Sticky boards are classified as mechanical pest control devices because they physically trap insects without the use of chemical substances. These devices work by utilizing a sticky adhesive surface that captures pests upon contact, providing a non-toxic method of pest management. The use of sticky boards is suitable for monitoring pest populations as well as for controlling specific insects, making them a valuable tool in integrated pest management strategies.

In contrast, options such as insecticide sprays, pesticide foggers, and granular baits involve the application of chemical substances to manage or eliminate pest populations. These methods rely on the toxicity of pesticides to induce pest control, differing fundamentally from the non-chemical, physical nature of sticky boards. This distinction is important for understanding various pest control methods, particularly in contexts where chemical usage may be limited or undesirable.