How Do You Get Rid Of Powdery Mildew On Succulents?

How Do You Get Rid Of Powdery Mildew On Succulents? Treatment. To treat powdery mildew, gently remove any infected leaves and stems that have begun to show signs of damage and then apply a fungicide. Fungicides containing sulfur, neem oil or triforine may be effective at killing powdery mildew on healthy leaves, stems and buds.