How To Stop Powdery Mildew
...the temperature is under 90° F. Do not apply any of these oils if you have used sulfur. DIY Options For home remedies I turned to advice from Washington State University horticulturalist Linda Chalker-Scott. How about milk, widely touted as a powdery mildew treatment? According to Chalker-Scott the answer is yes it might work, but you may need to apply milk before powdery mildew appears. And the studies were done with whole milk, so the effectiven...