Powdery mildew
Powdery mildews in the order Erysiphales are widespread and varied. These powdery mildews occur in many countries around the world and have been recorded on 256 species of plant in 59 families. "Ampelomyces quisqualis" has been shown to attack more than 64 species of powdery mildew in the genera "Brasiliomyces", "Erysiphe", "Leveillula", "Microsphaera", "Phyllactinia", "Podosphaera", "Sphaerotheca", and "Uncinula".