Fungus Pharm is a 100% pure RTU sprray made with Certified Organic Soybean Oil. When used weekly it is effective at preventing Powdery Mildew, conrolling Rusts, Blackspots, mold and more. Please water the infected plants in the AM, then at dusk, spray them with a fine even mist on the stems, leaves top and bottom and in the case of trees, the entire trunk where eggs are wintering over. Spraying in the  evening lengthens drying time and allows the oils to penetrate the cell wass of the fungus and break it down.