What does "disease resistance" refer to in fungi?

Disease resistance in fungi refers to the propensity of fungal populations to develop resistance to fungicides, often as a direct result of repeated applications of the same chemical. When a fungicide is used consistently, it can create selective pressure on the fungal population. This selective pressure may allow individuals with genetic mutations that confer resistance to survive and reproduce, leading to a population that is increasingly tolerant or resistant to that specific fungicide.

This concept highlights the importance of using an integrated pest management strategy that includes rotation of different classes of fungicides, application of biological controls, and cultural practices that enhance plant health, thereby reducing dependence on chemical fungicides. Understanding this resistance mechanism is crucial for effective pest management in turfgrass systems, as it can directly affect the efficacy of control strategies and influence the management practices that should be employed to minimize the development of resistance.