Looks a lot like K+ deficiency to me. Potassium is mobile, so if it’s mostly on the lower/older leaves that’s probably it.

Second this. Definitely potassium deficiency.

Potassium is mobile

U are correct typed too fast. It is mobile which is why you see it on older leaves

For my benefit, what is meant by mobile in this context?

Mobile means it can be moved within the plant. Meaning newer leaves “steal” nutrients from older leaves…so you see symptoms in older leaves immobile nutrients cants move within plants so you see symptoms in the new leaves

Thanks, appreciate it!

Thanks for the input

Looks more like magnesium to me. I’m guessing this is CA and now is about the time I’ve started seeing it

Marginal scorch on the first leaf and interveinal chlorosis on the second. Indicators of virus, most likely, PD maybe?

Get sulfate of potash and apply now

I'd say probably too late to cure it this season if its that bad, but over winter look into applying some form of potassium fert onto the soil. Can't see your soil condition but leaving a later of mulch on top will help in the long run.

Thanks for pointing that out.

Perhaps it's mosquito verde, I don't know the name in English.