Powdery mildew is more likely to occur in Seraphim, so prevention and treatment should be done in advance.

Powdery mildew control: spray carbendazim by root irrigation and sprinkle Baiyao on the soil surface.

Powdery mildew treatment: spraying water on the leaves, covering the plants with plastic bags (knotting near the roots of the soil), sun exposure, or spraying special drugs.