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From what I can tell these are adventitious roots. If they came into contact with soil they would form roots. It's quite common, especially in warm, humid weather. Looks like you have a bit of stem damage there (the brown part), like maybe someone ripped off a piece with leaves and took part of the stem with it. :-)
Posted by lionheart on 2010-07-13, 21:50:15 Report this as offensive.
To clarify, the adventitious roots are the green knobby thingies (technical term). :-)
Posted by lionheart on 2010-07-13, 21:53:19 Report this as offensive.
Any ideas on what this is on the stalk of one of my tomato plants?
Uploaded by starly
on 2010-07-11, 23:35:06 into Bugs & Butterflies, Great Vegetables