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Old July 18, 2012   #56
RandyG
Tomatovillian™
 
Join Date: Apr 2009
Location: western North Carolina
Posts: 84
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Quote:
Originally Posted by Tania View Post
Randy, I never seen early blight starting on stems, producing white fuzzy growth and quickly spreading and killing a plant in a matter 2-4 days. I believe the early blight produced grayish fungal growth, and it starts on lower leaves, manifesting itself in grayish concentric spots which eventually leads to yellowing leaves.

I wish I had early blight, and not late blight, that's all I can say! Well, actually I wish I never have either, now or in the future! .

I actually never seen early blight lesions on my tomato leaves since we moved here (perhaps it is just too cold here for its rapid development most of the summer). They are very different from late blight lesions.
Your original post with the picture said you removed the plant and that the late blight disease did not spread. That is one of the reasons I said it was early blight. If it was late blight, there would have already been latent infection when the disease showed up on the stem, and you would have seen more late blight on nearby plants.You did not indicate in the original post for this to be the case. Also, early blight often does infect stems even before it shows the leaf spotting. this is called the stem lesion or collar rot phase of early blight. If you search on the internet, you can find images of the stem lesion phase of early that look like what your picture showed. The image you presented does not look typical of late blight development on the stem. Also, stem lesions from late blight usually show up after leaf symptoms.
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