Which of the following is LEAST LIKELY to be used to control a pest?

Subsoiling is primarily a soil management practice aimed at reducing soil compaction and improving soil aeration, drainage, and root penetration. While it can have indirect benefits for crop health and potentially influence pest populations by improving soil structure and conditions, it is not a direct method for pest control.

In contrast, crop rotation directly alters the pest environment by changing the host plants available for pests, thereby disrupting their life cycles. Pesticide application is a more straightforward and widely used approach for controlling specific pest populations through targeted chemicals. Biological control involves using natural predators, parasites, or pathogens to manage pest populations, which is a well-established method in integrated pest management strategies.

Therefore, while subsoiling has benefits for overall soil health and crop performance, it does not serve as an effective or direct method for pest control, making it the least likely option among the choices provided.