Which of the following is an example of chemical control in pest management?

Chemical control in pest management refers to the use of substances, either naturally derived or synthetically manufactured, to manage pest populations. This method often involves applying pesticides that target specific pests to reduce their numbers or prevent damage to crops and other plants. The use of these substances is a direct intervention in pest populations, making it a critical and widely adopted practice within integrated pest management strategies.

Other methods, such as plant breeding for pest resistance, installing physical barriers, and implementing crop rotation, are categorized as cultural or physical controls rather than chemical. These practices focus on changing the environment, plant genetics, or cultivation techniques to naturally deter pests, rather than using chemical agents to target them directly. Thus, the option highlighting the use of pesticides as a form of chemical control is the most accurate representation of that category within pest management.