Erysiphe diffusa

About

Erysiphe diffusa is a fungal plant pathogen that is known to cause powdery mildew on multiple host genera, including soybeans. It has been recorded as a likely accidental infection on papaya, along with its usual host genera which include Glycine, Desmodium, Hylodesmum, Apios, Psoralea, Glycyrrhiza and Desmanthus. The species was formerly known as Microsphaera diffusa.

Summary from Wikipedia