My BIL who lives in NJ, near the coast, just sent me this photo and asked if I knew what it could be. I am stumped and hope someone here can tell me what is going on. He says it is not powdery mildew, the blades are just snowy white, devoid of any chlorophyll. He lives in one of those neighborhoods where the community cuts the lawns and apparently the mowers have spread this weed (?) throughout the area.
Anyone have thoughts on what it might be? Thanks