Bush Doctor® Force of Nature™ Fungicide controls powdery mildew for seven to 10 days with a 1 percent spray solution on many types of crops such as melons, squash, tomatoes, tree crops, grapes, cucumbers and flowers. Applied as a foliar spray, Force of Nature™ Fungicide is a great addition to a well-managed disease program. Force of Nature Fungicide is nontoxic to humans and animals. Use caution when applying to roses and peppers. Makes 25 gallons of solution.