One very effective Powdery Mildew Treatment is by removing the affected leaves and other stem areas as soon as the mold is detected. The leaves should be buried in the ground, and covered with mulch so that the fungus spores are killed and do not spread to other plants in the area .
The infected leaves and other plant parts should not be used for composting as this will increase the transmission of the fungus spores. The leaves and other parts should be destroyed completely so that no trace of the plant and mildew causing fungi remain.
Regular inspection of the plant to check for mildew is highly recommended.