Deshojo question

AJL

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Can any Acer experts advise me please?
I bought a twin stem Acer Deshojo from a specialist Acer grower in UK in 2021.Its a nice healthy looking tree about 3 foot tall and wide
I decided to ground -grow it to thicken the trunk so I planted it in good loamy soil in my garden .
In Spring 2022 all the new leaves and shoots were very slow to grow and this year all the first leaves have withered - I think it looks like frost damage but none of my other garden maples growing in the same bed have been affected by frost damage.
Is Acer Deshojo normally less hardy than other Acer palmatum forms?
 

Shibui

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When spring shoots wilt and die check the base of the trunk. Black bark is a symptom of fungal infection. Seems to be associated with wet soil through winter and spring. Seems to be no cure when infection is advanced enough to kill shoots, unfortunately. That problem is general to AP and not specific to Deshojo.

If no black bark it may be something else.
 

bwaynef

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Black bark in spring is usually pseudomonas.
 

dbonsaiw

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If no black bark it may be something else.
I don't mean to hijack the thread, but can you discuss what this "something else" may be? I noticed that one of my tridents is doing this. Nothing weird on the bark, but at least one shoot is wilting and it looks like the tip died.
 

Kadebe

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Can any Acer experts advise me please?
I bought a twin stem Acer Deshojo from a specialist Acer grower in UK in 2021.Its a nice healthy looking tree about 3 foot tall and wide
I decided to ground -grow it to thicken the trunk so I planted it in good loamy soil in my garden .
In Spring 2022 all the new leaves and shoots were very slow to grow and this year all the first leaves have withered - I think it looks like frost damage but none of my other garden maples growing in the same bed have been affected by frost damage.
Is Acer Deshojo normally less hardy than other Acer palmatum forms?
Do you have pictures?
 

bwaynef

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I don't mean to hijack the thread, but can you discuss what this "something else" may be? I noticed that one of my tridents is doing this. Nothing weird on the bark, but at least one shoot is wilting and it looks like the tip died.
Wilting w/ no outward marking COULD be verticilium wilt. (Once you're satisfied its not going to resprout (but give it a month or so), if you cut into it and see dark brown/green/black in the tissues that carry water/nutrients, its likely VW. Clean anything you cut it with.)
 

AJL

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When spring shoots wilt and die check the base of the trunk. Black bark is a symptom of fungal infection. Seems to be associated with wet soil through winter and spring. Seems to be no cure when infection is advanced enough to kill shoots, unfortunately. That problem is general to AP and not specific to Deshojo.

If no black bark it may be something else.
Thankyou all for your comments/observations
No black bark or cambial necrosis. It just young leaves tips withering/ blackening soon after emergence. We have had a few light frosts in the past couple of weeks which I suspect might have caused damage but none of my other maples are affected this way. Is Acer Deshojo a less hardy clone than most ? I will post photos when I get the chance
 

TomB

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Is Acer Deshojo a less hardy clone than most ?
I haven’t noticed much difference between my deshojos and regular palmatum, though I do tend to ‘baby’ the deshojos a little more. It does sound like frost/wind damage. I’ve also seen that kind of damage from aphids, and fungal infections.
 

BonsaiEire

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I have a deshojo that is suffering similarly I believe it's a fungal infection. I'm currently trying to treat with a bacillus subtilis fungicide product from probio carbon hopefully will bring it round for me. I know Walter Pall wrote about deshojo bring prone to suffering from fungal infection on his blog after he lost one.
 

AJL

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Do you have pictures?
Photos of Acer palmatum Deshojo As there is no sign of stem blackening Im thinking frost might be the cause but is Acer Deshojo normally so tender ?
For comparison adjacent Acer Little Princess ,Acer Senkaki and Acer palmatum have no symptoms of dieback


IMG_1001.JPG Deshojo

IMG_1004.JPG
 

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AJL

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A quick update:-There are still no signs of recovering on this tree , most of the emerging leaves withered and died except for one small bottom branch that is now in leaf. None of the other leaf buds seem to be moving on the rest of the tree.
There are a few small dark spots on some of the upper twigs but its still green under the bark and no sign of blackening on bark on the trunk or lower branches
Its been growing in good loamy garden soil for over 18 months and all my other Acers and other shrubs around it are doing fine so Im mystified and Im thinking I may have to do an emergency dig up and investigate the roots then re- pot and give it hospital treatment and then hope it recovers.
Strangely all the cuttings I took from it last year have survived and are now putting on extension growth so at least all is not lost!

Any advice would be most welcome! I realise its not the best time of year for digging this up but I really dont want to lose this tree!!
 

TomB

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I can't see that digging it up will do anything beneficial. As you probably know lots of people in the UK have had trees suffering this year, so this might just be an example of that. I would consider treating for fungus rather than any other course of action (I have good success with the Maru biological treatment from Pro-bio carbon) but you may just need to wait and see.
 
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