Some kind of blight on tomato plants?
I have this blight/fungus?? on my tomato plants. It started on my cherry and has turned the leaves to brown, though the plant continued to put out fruit. It starts with brown spots on the leaves, then the leaves turn yellow, then brown/grey and die. It is spreading among my plants. If the plant is more mature, sometimes it does not kill the entire plant but just a "branch." The plants continue to yield fruit but the foliage dies off. This happened to my plants last year, too, so I wonder if it's something in the soil? We had a really mild winter here so maybe it was too mild to kill whatever it is.
Any idea what this is or how to control/get rid of it? Thank you in advance for your help! So discouraging to put in an entire garden and then have this happen.