Powdery mildew appears as a white or grey powdery coating on leaf surfaces. Unlike most fungal diseases, it thrives in warm, dry conditions with poor air circulation — not just wet environments.
Identifying Powdery Mildew
What Causes It
Powdery mildew spores are always present in the air. They germinate when:
Treatment
Baking soda spray: 1 tsp baking soda + 1 tsp neem oil + a few drops of washing-up liquid in 1 litre of water. Spray on affected areas weekly.
Milk spray: Mix 40% milk and 60% water. Spray on leaves in morning sunlight. Proteins in milk react with sunlight and have antifungal properties.
Commercial fungicide: If infection is severe, use a systemic fungicide labelled for powdery mildew.
Remove all heavily affected leaves before treating.
Prevention
Ensure good air circulation around plants. Avoid overhead watering. Space plants so they're not touching. Don't overfeed with nitrogen — lush growth is more susceptible.
