Problem and not sure

[Setts71]

G'day all, I've been growing for approximately 40 years outdoor and in and I have never seen this before. I've had it under the microscope and it's not mites or anything else living. I have others near it that get everything exactly the same including Coco/perlite mix and none are showing these symptoms. So I'm hoping someone can give me an idea of what it is please.

 

[Goonie Goat]

G'day all, I've been growing for approximately 40 years outdoor and in and I have never seen this before. I've had it under the microscope and it's not mites or anything else living. I have others near it that get everything exactly the same including Coco/perlite mix and none are showing these symptoms. So I'm hoping someone can give me an idea of what it is please.

Could be the early stages of leaf septoria. A mix of copper sulphate in water or other fungicide should fix it.

How's the ph of the runoff? Could just be a bit of lockout or a bit hungry for more cal/mag (chlorosis) or potassium?

Welcome to the forum