This study examined how fungal spores in the air of shiitake mushroom factories change with the seasons and relate to a disease called shiitake artificial log rot disease (SLRD). Researchers found that when temperatures drop and humidity rises in autumn and winter, a harmful fungus called Trichoderma thrives in the air and causes more disease. By keeping the growing areas warmer, growers can significantly reduce disease occurrence and protect both their crops and workers’ health.