Powdery Mildew on Houseplants; Causes, Symptoms, Treatment and Prevention


Houseplant Disease, Powdery Mildew disease

Powdery Mildew Disease Causes & Symptoms

Powdery Mildew is a fungal disease characterized by spotting or coating of the leaf surface with a white powdery deposit.

The disease results in disfigured leaves. In severe cases Powdery Mildew can spread to the stems and flowers of the plant.

Powdery Mildew is prevalent in warm, humid conditions coupled with poor ventilation. The disease is not as fatal as the Botrytis Disease which is characterized by a grey, fluffy mould covering all parts of the plant

Treatment of Powdery Mildew on Indoor Plants

  1. Remove the badly affected leaves and discard or burn them to reduce spread to other parts of the plant.

  2. Spray the plant with a systemic fungicide as per the manufacturer's instructions. Ensure to cover all the parts of the plant with the fungicidal solution.

  3. Alternatively, lightly dust the leaves with a sulphur compound used for this purpose. Make sure the leaves are well covered with the sulphur compound.

How to Prevent Powdery Mildew on Houseplants

  1. Keep the plant well-pruned to allow light penetration and to get rid of the breeding grounds for the disease.

  2. Regularly, clean the leaves to get rid of dust as well as reduce the disease infestations.

  3. Do not mist or wet the foliage during watering to minimize occurence of this disease.

  4. Improve the air circulation for your plant to discourage the disease.

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