Another effective method for controlling powdery mildew is using a milk spray. Mix one part milk (preferably whole milk) with two parts water and spray it on the affected areas every 10 to 14 days. The beneficial bacteria in milk can help combat the fungus. Additionally, consider planting resistant varieties or incorporating companion plants like marigolds, which can help deter pests and improve overall plant health. Keeping your plants well-watered at the base and avoiding overhead watering can also reduce moisture on the leaves, helping prevent the spread of mildew.