I have an indoor fruiting crop, and I have an out of control powdery mildew problem. I've used Greencure (potassium carbonate), watered, etc. and all seems to slow the process, but the next thing I know it's everywhere again. My air flow is superb, and my humidity is low. I have heard that 'Eagle 20ew' is supposed to be an end all; however, I cannot find a retail dealer. Please help me kill my problem before it ruins my crop.
Certified GKH Gardening Expert
Try neem oil. Very effective and not harmful to people or animals. Here is more information: https://www.gardeningknowhow.com/problems/pests/neem-oil-uses.htm