Garden Pests and Diseases: Disease? Fungus? bugs? Top leaves turning black Help please`, 1 by Suny_Freebird

Suny_Freebird wrote:
The main garden in in the back. There are three tomato plants in large pots in front. One tomato in the front has this problem with top leaves turning black. It is on tomatoes, parsnips, sunflowers -- but not all of them. Please help to identify and tell me what can be done. I sprayed with a mixture of Murphy's oil soap, baking soda, vegetable oil & water but saw no improvement.

Don't want to lose my entire garden :-( I have more than the 5 photo uploads alowed so can post more in any of my DG friends are willing to help.
Thank you - thank you - thank you,
Suny