Do I remove this plant and forget about the fruit, or do I let the fruit ripen and the plant die before removal?

The other five plants have no signs of the disease, not a single yellow leaf in the garden. They are also a little behind setting and ripening fruit. Should I expect them to get it? Is there something I can do to keep them healthy?

Thanks. I did search for answer but couldn't find them, then I don't know where the FAQs are around here.

Ted

I removed bad foliage ten days ago and sprayed Daconil. There were a few worrisome plants, both early blight and fusarium suspected. The blight issue seems to be solved and regular Daconil treatments are planned.

One plant is not going to make it. Period. Fusarium is advancing fast, 2/3rds of the way through the plant, Daconil didn't touch it. Three others have the yellowing leaves down low that could be more Fusarium or overwatering.

I was wondering if it is prudent to pull the plant or let it ripen the fruit while dying.

And they won't. That's because if it's Fusarium, the fungus is in the soil not on the leaves or stems.

About what to do: it's kind of up to you at this point. It's not contageous just sitting there. (if you use a tool to cut the stems when you pick the tomatoes, don't use it on another plant without disinfecting it.) It usually is associated with watering problems, poor drainage in compacted soils, etc. Take extra special precautions to avoid overwatering the remaining plants you wish to save, meaning let the soil go bone dry down 2-3"..Below that, it should be moist, not wet. Trust me, they can take it.
Your soil will not be safe for planting any Fusarium sensitive plants such as carnations pretty much indefinitely. For now on, plant something not subject to the wilt there, and always treat the soil like it is contaminated - don't spread it around your yard, and disinfect any tools , shovels, etc that come into contact with it. Or dig it out and replace it.
When you get rid of the plant, toss it in the trash pick-up, not in your yard or compost.

As far as confirming fusarium, I did a LOT of reading, and did the stem test myself. It was text book browning of the vascular tissue. I understand it could be verticillium, but two farmers market growers said verticillium would be very odd where I am and fusarium is common. I don't have a lab test.

I did ask if I should dig out this garden, which connects to two others and is feet from a fourth which only has a few pavers leading to a fifth, and they said not to dig it up because it was everywhere around here, I would probably spread it and it would probably come back if I didn't.