What control method is being used when selecting a blend of tall fescue cultivars with natural pest resistance?

Using a blend of tall fescue cultivars with natural pest resistance is an example of cultural control. This method focuses on enhancing the growing environment and making it less conducive to pest and disease development. By selecting cultivars that are less susceptible to pests, turf managers can promote a healthier lawn that requires fewer interventions.

Cultural control practices often include things like choosing the right grass species for the climatic conditions, managing watering practices, and using appropriate fertilization techniques. In this case, the decision to use resistant cultivars helps to bolster natural defenses against pests, reducing the need for chemical inputs and improving overall turf health.

The other methods listed do not apply here: chemical control involves the use of pesticides to manage pests, biological control relies on using natural predators or parasites to control pest populations, and mechanical control typically includes physical methods like mowing or pest traps. Each of these methods focuses on directly addressing pest problems rather than fostering long-term resilience through plant selection.