Q.Cucumber Mosaic Virus
If my tomatoes have cucumber mosaic virus, should I pull them up? The tops are curled and matted together. I can’t describe it. The whole plant is bushy but light green, and a few bottom leaves are turning yellow with black spots, 6 out of 8 are like this.

Certified GKH Gardening Expert
It is actually likely Tomato Tobacco Mosaic Virus. There is no cure for it, so you must destroy the plants. Also, do not plant any nightshade family vegetables in that spot for at least a year as this virus will infect and kill them as well.
Here is more information:
http://www.ipm.ucdavis.edu/PMG/r783102711.html