Blackberry Tumor

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Sarahskeeper Brockton, MA(Zone 6a) Jul 31, 2006

I noticed this on a fruiting stem yesterday. I sliced it open and it looked like a cucumber, but very hard.
Any ideas?
Andy P

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Indy Alexandria, IN(Zone 6a) Jul 31, 2006

tumor? ...green cocoon?

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Sarahskeeper Brockton, MA(Zone 6a) Aug 01, 2006

Indy, Here it is, sliced end to end. It apears to be a swelling of the stem.
Very strange. The wet look is because I rinsed it. I thought the rusty blade had discolored it but no, that is the color(s).
I'm not worried, just curious.
Andy P

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Lucky_P Hopkinsville, KY(Zone 6b) Aug 01, 2006

It's a stem gall - there are species of wasps & mites which can induce formation of these 'tumors'. Usually not a problem unless there are large numbers of them.
Google up 'Rubus stem gall' for more info.

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Sarahskeeper Brockton, MA(Zone 6a) Aug 01, 2006

Thanks a lot Lucky.
I think I've seen it in years past but it has not been a problem.
Just curious in case it was a real problem.
Thanks again
Andy P

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