Looks like it's spread by white fly, and I've been reading up in something similar.

TICV

The Univesity of California websites don't seem to be too worried about Tomato Infectious Chlorosis Virus in commercial fields, but I've read about carrfully destroying plants. I'm just trying to control the whiteflys and maintain calcium and magnesium which might be related.

jennie,

We like to see pictures. would you please post one?

Here ya go! Thanks!

Reminds me of herbicide/glycophosphate damage.

glyphosate

Thanks - if that's the case, will they likely recover if there is no further exposure? Not completely sure how they would have gotten exposed, but it's possible, I reckon......

I had a plant with this. Here is a thread I posted on.

Tomato afffected by roundup

The plants survived, and so did the stumps I was trying to kill.

Put it this way: It IS damage from glyphosate.

If that is the only damage, then just prune that stem out and encourage a new stem to grow. Sometimes the new stem will grow normally and sometimes it will not. IME, 2,4-D causes more permanent damage than does glycophospahte.