What is an example of a physical method of pest control?

Applying mulch to suppress weeds serves as an example of a physical method of pest control because it involves the use of a tangible material to create a barrier against weed growth. By covering the soil with mulch, light is restricted from reaching weed seeds, thereby inhibiting their germination and growth. This method is environmentally friendly as it does not involve chemicals, making it a sustainable approach to weed management.

Other choices involve different forms of pest control methods; for example, using insecticidal soap is a chemical control method, while planting trap crops pertains to cultural practices aimed at managing pest populations by attracting pests away from the main crop. Releasing predatory insects is a biological control approach where natural enemies are utilized to keep pest populations in check. Each of these methods plays a role in integrated pest management strategies but do not fit the category of physical methods as mulch does.