What is a chemical control strategy for pest management?

The correct answer focuses on the application of pesticides as a chemical control strategy for managing pests. Chemical control specifically refers to the use of synthetic or natural chemicals, commonly known as pesticides, to reduce pest populations that may harm agricultural crops. This strategy involves targeting specific pests to effectively decrease their numbers, thereby protecting the crops and ensuring yields.

In contrast, the other options represent non-chemical methods of pest management. For example, using organic fertilizers aids in improving soil fertility and plant health, but it does not directly target pests. Crop rotation is a cultural practice that helps in managing soil health and managing pest cycles, but again, it does not involve the direct use of chemical agents. Lastly, enhancing natural predator populations is a biological control method where natural enemies of pests are encouraged to thrive, which also does not fall under chemical control. These approaches are integral to integrated pest management but are distinct from the chemical control method represented by the correct choice.