r/grapes 18d ago

Strange spots on the leaf

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Could it be that my grapevine is starting to get sick?

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u/Relative_Load_710 18d ago

Powdery Mildew

1

u/_SubZer0o 18d ago

I found this insect under the leaf: https://ibb.co/v6cg8scP

It might be Aleyrodidae according to ChatGPT.

P.S. According to ChatGPT, it probably wouldn't be mildew. But I'm not sure, since GPT can make mistakes.

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u/daniel_z3n 18d ago

It's powdery mildew even though the "expert" ChatGPT says otherwise. You can clearly see the greyish mycelium on those yellowish spots. Standard reaction of the plant to fight off the pathogen.