HydroWorxx Disease Control is made by combining a soluble copper with a fatty acid. The copper and the fatty acid combine to form a copper salt of the fatty acid, known technically as a true soap. The copper soap fungicide controls listed diseases using low concentrations of copper. A wide range of fungal and bacterial diseases including: powdery mildew, rusts, black spot, leaf & fruit spot, downy mildew, fruit rot, late blight, peach leaf curl. It protects buds and flowers. Use up to day of harvest.