Posted 6/27/2015 07:02 (#4648504 - in reply to #4648492) Subject: RE: tomato problem
Tomato blight. Caused by a fungus that persists in the soil. Rain splashes it on the lower leaves. It gets worse if the tomatoes have been in the same spot over the years.
Apply a fungicide. Available at Walmart, Kmart, Lowes, Menards, etc.