Knowledgebase
Powdery Mildew #887076
Asked October 03, 2024, 3:02 PM EDT
Muskegon County Michigan
Expert Response
The photo I took for Copilot was taken on their app so I don’t have a photo the powdery mildew. It was on the leaf running along the vein. In its ID copilot mentioned that fact but I don’t have more pictures. I used the Etsy app to send the picture to the seller.
I sent the only apple photo I had in the first email.
Apologies, but it is a little bit difficult for me to tell what damage you're referring to. Is it along the margin that's affected? I do see a little bit of powdery substance, but nothing that looks like powdery mildew.
The damage along the edge looks like it could be due to insect feeding, but it it's very uniform along the edge so that seems unlikely. If you or the seller cleaned the plants that damage could be due to some abiotic cause. It looks like it may even be a reaction to some extra rooting hormone. Regardless, I don't think it's anything to be too concerned about though, especially since you took the precaution of discarding the affected plants.
I've included a link to some general information about begonia pests and diseases, so I hope that's of some help. Also a couple of publications on powdery mildew.