This research investigated how a newly discovered yeast pathogen affects shiitake mushrooms, which are important food crops. The study found that this pathogen specifically attacks shiitake mushrooms by causing brown discoloration and tissue damage, but doesn’t significantly affect other mushroom types. The researchers also identified two effective chemical treatments to control this pathogen. Impacts on everyday life: • Helps protect commercial shiitake mushroom production and food supply • Ensures better quality shiitake mushrooms for consumers • Provides mushroom farmers with specific treatment options for disease control • Contributes to maintaining affordable shiitake prices by preventing crop losses • Improves food safety by better understanding mushroom pathogens