How can I effectively treat and prevent powdery mildew on my hibiscus plants?

To effectively treat and prevent powdery mildew on hibiscus plants, you can use fungicides specifically designed for powdery mildew, prune affected areas, ensure good air circulation around the plants, and avoid overhead watering. Additionally, planting hibiscus in a sunny location and providing proper spacing between plants can help prevent powdery mildew.