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Black spots on tomato stems - diagnosis?
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May 23, 2020
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KarenO
Tomatovillian™
Join Date: Oct 2012
Location: Vancouver Island
Posts: 5,923
Hello, Alternaria If close to the soil or stem rot are my thoughts. Are you sure there is no disease on the foliage? Late blight can also look like this on stems but almost certainly There stocks be foliage disease as well.
KarenO
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