This research examined harmful fungi that contaminate indoor mushroom cultivation facilities in Korea. The study found four species of Trichoderma fungi floating in the air that can damage mushroom production. The researchers identified effective antifungal treatments and highlighted the importance of air quality management in mushroom farms. Impacts on everyday life: – Helps protect commercial mushroom production, ensuring stable supply to consumers – Identifies ways to reduce crop losses and keep mushroom prices stable – Improves understanding of indoor air quality management in agricultural facilities – Provides guidance for safer and more efficient mushroom cultivation – Demonstrates the importance of proper sanitization in food production facilities