Those plants looks pretty bad and I would have yanked them long before and throw it in the trash and not compost the diseased leaves. To me it looks like a type of fungal wilt, maybe fusarium wilt.
People do use copper and Daconil as prevention sprays to avoid fungal disease. Personally I grow organic and avoid them. I am more OCD with my plants however, so I actively remove any diseased, yellow or spotted looking leaves so diseases have less chance to spread. If a plant is looking bad and not likely to produce well I rather yank them than to sustain an unhealthy plant.
Last edited by maxjohnson; February 15, 2017 at 06:57 PM.
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