Black Cherry leaf problem
I'm unable to match all symptoms to those on Tomato Problem Solver. Problem begins with a brown/copper irregular spot on leaf. No border, no bulls eye or no black spots. Spreads until entire leaf is greenish, grayish brown. Eventually spreads to other leaves on that branch. Leaves become leathery, then brittle. Entire branch eventually withers. Leaves do not turn yellow and do not fall off. Main stem does not seem to be affected. Fruits are just ripening and look normal. No oozing from stem when placed in water. Cut stems look and smell normal. On a few leaves I have found tiny black spots on underside that I can wipe off. Plant is in a self watering container and has been treated with Daconil every 7 to 10 days. Weather has been very warm to hot and humid.