Which pest control method involves developing plant varieties that are resistant to certain pests?

The method of pest control that involves developing plant varieties resistant to certain pests is known as host resistance. This approach focuses on breeding or selecting plant varieties that have inherent characteristics which make them less susceptible to damage from pests. By enhancing the natural defense mechanisms of plants, such as thicker cell walls or compounds that deter pest feeding, farmers and horticulturists can reduce the reliance on chemical pesticides. This not only contributes to sustainable agriculture practices but also promotes biodiversity by allowing crops to thrive in a healthier ecosystem with fewer chemical inputs.

In contrast, the other methods of pest control do not pertain directly to the development of plant resistance. Biological control involves the use of natural predators or parasites to manage pest populations. Cultural practices involve changes in farming techniques or the environment to reduce pest establishment, such as crop rotation or adjusting planting times. Mechanical control refers to physical methods of pest management, such as traps or barriers. While these methods are valuable in their own right, they do not focus specifically on creating resistant plant varieties.