Appears in late season (started a few weeks ago) , starts on bottom leaves and progresses up, most of plant still looks OK to me.....top leaves maybe a little lighter green than other plants.
Does the leaf close-up show interveinal chlorosis? Could this be a mineral (iron) defienciency? But two feet away from affected plants, all is well. The issue is also not variety specific.
This has me stumped. Any help is appreciated!
