What are your best experiences for treating white powdery mildew? (4th week of flower)

Treating white powdery mildew (WPM) effectively involves a combination of prevention, cultural practices, and treatment options. Here are some of the best strategies based on my experience and research: Ensure adequate spacing between plants to promote airflow. Use oscillating fans to keep the air moving within indoor grow spaces. Maintain relative humidity levels below 50% during the flowering stage. Use dehumidifiers in humid climates or indoor growing environments. Remove and destroy infected plant parts immediately to prevent the spread. Treatment Options Mix 1 part milk (preferably skim) with 9 parts water. Spray this solution on the affected areas. The milk proteins can create an environment that inhibits mildew growth.