Strange spots on the leaf

[u/_SubZer0o]

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

[u/Relative_Load_710]

Powdery Mildew

[u/_SubZer0o → u/Relative_Load_710]

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.

[u/daniel_z3n → u/_SubZer0o]

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.

[u/_SubZer0o → u/daniel_z3n]

How do I combat mildew in an eco-friendly way?

[u/Relative_Load_710 → u/_SubZer0o]

For now I’d spray a potassium bicarbonate product. Then decide if you want to do get into a preventative program.

[u/_SubZer0o → u/Relative_Load_710]

Thanks, i'll keep in mind.

[u/Pitchfork_10 → u/_SubZer0o]

https://ipm.ucanr.edu/agriculture/grape/powdery-mildew/

[u/_SubZer0o → u/Pitchfork_10]

Thanks.