Has anyone ever observed this type of gall? I have had it before in another bed where it completely split a 6 foot cane on a climber and the cane looked like this from top to bottom!
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Wow - quite interesting looking but I have not seen this
Hi John, have you cut through any of the canes affected with that to insure you’re not seeing damage from something like a Flat Headed Apple Borer? Their maggots eat the cambium layer as they burrow downward to the crown of the plant where, when they encircle the cane, they completely kill it. That’s the only thing I’ve ever encountered which would result in that kind of scarring of the entire cane.
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Thank you for the response. I saved the cane so will cut into it and check.
| roseseek
July 25 |
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Hi John, have you cut through any of the canes affected with that to insure you’re not seeing damage from something like a Flat Headed Apple Borer? Their maggots eat the cambium layer as they burrow downward to the crown of the plant where, when they encircle the cane, they completely kill it. That’s the only thing I’ve ever encountered which would result in that kind of scarring of the entire cane.
You’re welcome, John. You should look to determine if you find any of their frass, which should pretty much resemble packed cocoa powder. They digest the cambium and expel the frass behind them while the surrounding cambium which doesn’t get eaten, calluses (scars) in an attempt to seal the wounds. Hopefully, that’s it. I’d hate to think something like this could have a contagious pathogen!
Wow. That is an impressive gall! I’ve been growing roses for many years but have never seen this. Does the rose look healthy otherwise? Does it bloom and do the leaves look healthy and green?
The rest of the rose is quite healthy and did bloom. I did remove the diseased cane. I have had others in the garden that had similar gall, one was a cane on a climber that had this over 5 feet of this gall