What is the white stuff on green leaves? What is hte name of the plant, please? I have sen this only on this plant. Are they related?
Powdery mildew, a fungal disease. There are many species of powdery mildew causing fungi and they tend to be specialized to a single species or a single genus, so the fungus species that attacked this certain plant might not infect other plants around it that are of different genus. From this picture, I can't tell what the plant is.
