In a humid environment, powdery mildew appears as what on the leaves of lilac, crape myrtle, chrysanthemums, asters, and roses?

• A. Brown spots
• B. Holes in leaves
• C. White powdery appearance
• D. Yellowing

Answer: (C)

Powdery mildew shows up as a white, powdery coating on leaf surfaces. In humid conditions, fungal spores grow on the leaves of lilac, crape myrtle, chrysanthemums, asters, and roses, creating that distinctive white film. That powdery appearance is the hallmark of this disease, unlike brown spots, holes, or yellowing, which come from other problems such as leaf spots, insect feeding, or nutrient issues. To help prevent it, improve air circulation around plants, avoid overhead watering, and remove affected leaves; resistant varieties and fungicides can be used if needed.