Black spots on leaves necrosis

[davethcman]

I have bad necrosis on leaves I've been growing 40 years and never seen anything like this my leaves speckled yellow then turn black and just burnt up I'm doin everything the same as always it looks like someone spraying something in air but most my big plants in the ground don't have much on em it's ones in potters

 

[mancorn]

Any change you have a lot of smoke/ash from forest fires? Only time I’ve have leaves go black is when I had ash raining on the plants and then sprayed water on them.

Post (full plant) images, otherwise everyone is just guessing.