MilStop SP - 5 lbs - 1M112B04Prevent & Control Powdery Mildew, Downy Mildew and Many Other Foliar Plant Diseases! MilStop provides growers and gardeners with a cost effective treatment for foliar disease control. Proven to cure powdery mildew and prevent a long list of other diseases, it can be applied throughout the growing season on most crops. The potassium bicarbonate in MilStop kills mildew spores on contact by pulling water from spores and altering the pH on the leaf