Fungicide resistance occurs when fungi evolve and develop the ability to survive treatments that were previously effective. This can happen due to genetic mutations or the selection of resistant strains when fungicides are used repeatedly. As a result, the effectiveness of these chemicals diminishes, making it harder to control plant diseases. The development of fungicide resistance can lead to increased crop losses and higher costs for farmers. To combat this issue, it is essential to implement integrated pest management strategies, such as rotating different types of fungicides and using biological control methods, to reduce the reliance on chemical treatments.