Unlike other natural insecticides, Dr. Conrad’s Super Natural Powdery Mildew Prescription does not use any harsh chemicals, surfacants, or emulsifiers. This super concentrated formula makes 16 gallons of foliar spray that can be used up to and including day of harvest. Made of nothing but 100% pure essential oils, this product is the safest possible way to protect your valuable crops and the people who ingest them. And it works better than anything else. Try it. You’ll see.