List one example of a physical pest control method.

Handpicking pests off plants is a clear example of a physical pest control method because it involves the direct removal of pests without the use of chemicals or toxic substances. This method relies on the physical action of a person manually taking the pests off the affected plants, which can help reduce pest populations effectively, especially for larger or easily visible insects such as caterpillars or beetles.

Physical pest control methods, as opposed to chemical ones, focus on utilizing mechanical means to disrupt pest life cycles or directly remove them from the environment. Handpicking stands out in its simplicity and practicality, making it an accessible choice for many gardeners and farmers who prefer to avoid or limit the use of pesticides.

Other options, such as using chemical sprays, setting traps with baits, and applying granular pesticides, involve either chemical substances or baiting techniques and do not fall under the category of physical methods. Each of these alternatives may have their own advantages and applications in pest management strategies but do not represent the physical removal or control of pests in the same manner as handpicking does.