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Chinese Elm problems
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Author:  Ross Hall [ 14 Sep 2020, 21:19 ]
Post subject:  Re: Chinese Elm problems

The bark just dropped off when I touched it. Like the jelly was pushing it off. The first photo was pre-repotting (Slip potted really, didn’t disturb the roots any more than I had to). The second at a different angle and with moss removed in a new pot. I don’t know If there’s any cambium left. It’s a goner I reckon. I can’t get over how quickly it happened.

Author:  daryl [ 14 Sep 2020, 21:41 ]
Post subject:  Re: Chinese Elm problems

You've lost me completely. If the first picture (in the pond basket) is before the repot in Spring then how come the moss and jelly algae are there?

Author:  Ross Hall [ 14 Sep 2020, 23:30 ]
Post subject:  Re: Chinese Elm problems

I repotted (slip potted) at the weekend.

Author:  daryl [ 15 Sep 2020, 09:20 ]
Post subject:  Re: Chinese Elm problems

Ross Hall wrote:
I repotted (slip potted) at the weekend.


Why?

Author:  Ross Hall [ 15 Sep 2020, 12:48 ]
Post subject:  Re: Chinese Elm problems

As you will note from the first photo, the basket was high sided and together with the tree foliage not allowing sunlight to hit the trunk. As stated it was also planted deeply So all contributing to a wet environment. It was only when the excess (rootless) topsoil was pulled away during an inspection this whole issue became apparent. The intention of the slip potting was to allow sunlight to hit the problematic area and increase the general airflow around the base of the tree. It would appear my actions came too late and the infection was established.

In general I’ve had success with autumn collecting / slip potting / repotting of Birch, Beech and Oak following the aftercare advice in the article on the Bonsai4me website addressing autumn collecting. I wasn’t intending to slip pot this Elm until spring but I felt the situation warranted it.

Anyway I’ll keep and key on this but it’s not looking the promising. The algae jelly appears to be growing back.

Author:  darreng [ 15 Sep 2020, 17:11 ]
Post subject:  Re: Chinese Elm problems

I'm just guessing but it feels like some kind of canker, although from what I know (very limited), it needs a wound in order to take hold in the first place?

I think if that wound that has been created encircles the whole trunk, I'd probably bury it and treat it like a ground layer. If there is healthy tissue bridging the gap, give it time and cross fingers.

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