Pepper Disease?

Question

Last year and this year my peppers seem to have some disease with spots on the leaves that looks similar to mosaic disease. I do have mosaic disease in the garden that kills off my cucumbers that I can seem to get rid of. The leaves on the pepper plants get the brown spots then they turn yellow and fall off. Last year this happened also but the plants seemed to recover and I had plenty of peppers. I'm concerned that this year the plants may die. I've read a few topics in this forum but couldn't find an answer. Also in the 3rd pic my beets have the spots also but they're growing fine and are almost ready for harvest. Look closely at the stem you can see all the leaves gone. Is there anything I can do? Is the soil too acidic? Would some type of fertilizer help?

Please help. 

I didn't find the right solution from the Internet. 

References:- 

https://www.helpfulgardener.com/forum/viewtopic.php?f=81&t=64171

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Thanks!