You can also spray the air around the plant with Lysol or another household disinfectant but be careful not to get too much spray on the leaves. If powdery mildew on African violets doesn’t improve, try spraying the plants lightly with a mixture of 1 teaspoon (5 ml.) of baking soda in 1 quart (1 L.) of water. Water African violets carefully and avoid wetting the leaves. Sulfur dust is sometimes effective, but usually doesn’t help much unless it’s applied before the mildew appears. Ideally, temperatures shouldn’t vary more than ten degrees.
Keep plants where temperatures are as consistent as possible. Most common diseases Botrytis Blight Fungus disease that is very common in greenhouse crops. Managing those will greatly enhance the pleasure of growing. Use a fan to circulate the air, especially when the air is damp, or temperatures are high. by Joyce Stork While there are many possible diseases of African violets, there are only a few which may commonly plague home growers. Avoid overcrowding and provide adequate space around plants. If your African violets have powdery mildew fungus, you must first isolate affected plants to prevent the spread of disease. Treating African violets with powdery mildew means taking precautions to avoid these conditions. Temperature fluctuations and low light can also contribute to fungal disease. Powdery mildew thrives where conditions are warm and humid and air circulation is poor. Causes of Powdery Mildew on African Violets Wondering what to do about African violets with powdery mildew? Looking for tips on African violet fungal control? Read on. If left untreated, leaves may dry and turn yellow or brown. Although powdery mildew on African violets isn’t usually deadly, it can definitely impact the overall health and appearance of leaves and stems, stunt plant growth, and reduce blooming substantially. White powder on African violet leaves is an indication that your plant has been infested by a nasty fungal disease.
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