Definitely powdery mildew. First step isolate that plant to hopefully avoid spread. If you can get as close to a commercial grade fungicide as you can. Something with mancozeb or propiconazole if possible. I’d spray all begonia regardless if they are symptomatic or not.
1 Comment
Definitely powdery mildew. First step isolate that plant to hopefully avoid spread. If you can get as close to a commercial grade fungicide as you can. Something with mancozeb or propiconazole if possible. I’d spray all begonia regardless if they are symptomatic or not.