This research addresses a practical challenge in growing edible mushrooms and using fungi to clean polluted materials: unwanted bacteria and molds prevent beneficial white-rot fungi from growing. Scientists tested various cheap chemicals to find which ones kill unwanted microbes while letting white-rot fungi thrive. They discovered that hydrogen peroxide at 1.5-3% concentration works best, effectively eliminating competing microorganisms without harming the desired fungi, making large-scale mushroom farming and pollution cleanup more feasible and economical.