Perhaps this is ti?

http://forums.gardenweb.com/forums/load/tomato/msg0620102718479.html

Here is a link that might be useful: your original post?

I also cannot find the original thread of this discussion

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Nancy, when there's a lot of activity here and there are many new threads what's been on the first page here gets bumped to the second page.

At the bottom of this first page you'll see that you just click to the second page and that's where your original thread is right now.

But Jeanne has also linked to it for you in this thread as well.

If you post in your original thread, now on the second page, it automatically reappears here on the first page.

Carolyn

This is how I (finally) was able to load an image using Photobucket, so these instructions apply to that website.
1) Open a (free) account at photobucket.com and upload your picture(s) into it;
2) Create a posting here;
3) Flip over to the photobucket web page displaying your photo. With your photo highlighted/selected you will see a list of 4 lines of code related to the picture. Single left click on "html code" and then, as the letters are highlighted, copy this string of text (press the 'control' key plus the letter 'c' at the same time to copy);
4) Come back to the posting here and paste the text string (press the 'control' and letter 'v' key);
5) Preview your posting and the picture should appear (crossing fingers).

Alternatively, you can just post a link to your photo(s) (if they are hosted on a website) by copying the photograph's link (e.g., http://example.com/dianephoto1 - the link showing in the bar at the top of your webpage), into the "Optional Link URL" shown below the box which contains text you are posting.

Yay, I figured it out!

Here are the photos:

Tomato Stem Disease Photos

This tomato is a Celebrity tomato in what I believe is the very early stages of this problem. The plant is healthy, vigorous, and flowering. The yellow you see is a vinegar bottle of water beside it for extra heat at night.

The first photo is there to show you that this isn't a "seedling" but a strong, tall plant. The second shows the ragged shrivelled stem at the soil line, going up about an inch from the ground. Unless I stop this disease/problem, this tomato is a goner in about two weeks.

For now, I have wrapped the lower stem with foil.

To summarize from the previous post:
- the disease/problem attacks the tomato plant at the soil line for about 1 inch
- appearance: a dry scar, as if the outer layer has been chewed away
- there may be a dry streak up the stem of the tomato if it is in advanced stages, like a thin dry creekbed running up the side of the stem
- leaves are fine, roots are fine, inside of stem is green and healthy
- no sign of fungus
- strikes in the spring
- seems to attack tomatoes that are close together
- healthy tomato plants eventually topple over because the stem corrodes right through
- seems to attack heirlooms more (or faster) than hybrids
- My seedlings are grown from seed and are large and healthy when put outside. They have been under greenhouse coverings since the weather turned cold.

Thanks for any ideas.