Very few diseases will have a widespread effect over a wide range of plants....most are rather host specific. Where are you located and how are you growing these plants? Dry, necrotic edges are typically a sign of watering issues. Or possibly fertilizer burn.

Looks like primarily high nitrogen burned edges to me not a disease. Plus if the photo color is correct the leaves are overly dark green which is also a sign of excess nitrogen. There are also signs of leaf edema which is a watering issue. Need more info from you on climate location, fertilizers used, and watering practices.

As gardengal said few diseases will affect a widespread of plants and of all the possible causes of plant issues off-kilter growing methods and pests are both far more common than diseases. Eliminate those two issues before thinking "disease".

Dave