Mechanical control methods include which of the following?

Mechanical control methods in pest management refer to physical strategies used to reduce or eliminate pest populations. These methods typically involve the use of devices or machines that can physically remove or prevent pests from causing harm. Examples include traps, nets, barriers, and other physical means of pest exclusion or removal.

The use of devices or machines for pest control is a straightforward representation of mechanical control, as these tools physically interact with pests rather than relying on chemical or biological means. This makes them an integral part of integrated pest management strategies, where physical methods are preferred for their immediacy and ability to target specific pests without introducing chemicals into the environment.

In contrast, the other options listed involve different approaches. Insect repellents are a form of chemical control that deters pests through applied substances rather than physical means. Biopesticides fall under the category of biological control, using natural organisms or substances to target pests. Applying chemical sprays represents a chemical control strategy, which relies on toxic substances to eliminate pests rather than physical interaction. Understanding these distinctions helps clarify why the correct choice emphasizes mechanical control methods specifically.