Always something new… Never had it before. Purple swelled spots 0.25-1 inch long on new shoots, seems to have entry point, when cut there is a hole inside going along the stem, but so far I do not see any insects inside. I would cut them off, but it will take away most of the crop. Should I? Sorry for the picture quality(lack of it) - it is bright out and i can’t see what I shoot.
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Bumping up. Does anybody have a clue?
It appears necrotic. I haven’t seen that prior, either.
Something is killing the cells.
A Google search of a combination of these words: “necrotic tissue grape/grapes and/or vine” pulls up a lot of things. I couldn’t quite match which particular pathogen you’re seeing.
Dax
You might email this girl:
https://www.youtube.com/watch?v=w15lOXf5s2M
It’s likely she’ll have an answer.
Dax
thanks for post the picture . After read your post, I checked my grapevine and saw some of my new grow have similar mark on the vine. I cut some vine off and opened the center of the vine but didn’t see any pests/worms inside.