Root rot or fungal attack in japanese maple

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Root rot or fungal attack in japanese maple

Post  jonathan on Sat Jul 16, 2011 3:27 pm

Hello-
I'm new to the site, but have wanted to join for some time. I have a japanese maple which is losing healthy looking leaves in the middle of July...Some leaves are turning brownish and wilting. I planted it in a large box last year, with poor drainage, I improved the drainage this past spring and the tree has been growing strongly and has looked healthy. I recently pruned it back somewhat heavily, and a few weeks later, it started wilting, new growth is distorted looking, twig dieback, and I think I see what looks like canker spots on branches...These symptoms occurred last year, I think due to the poor drainage of the box, which I fixed this year...and the way it has grown so far this year, has been great, until a few weeks ago. I typically spray Neem oil on all my trees every few weeks, and now I hear it isn't recomended for japanese maples. The reason I was again alerted to this occurring was that the soil seemed to be staying damp for too long...I don't water it until it dries out however...Anyway, I guess I am preparing myself for the loss of this tree, especially if it has canker from what I'm reading online. Any tips would be great. Thank you.

Jonathan

jonathan
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Re: Root rot or fungal attack in japanese maple

Post  AlainK on Sat Jul 16, 2011 3:39 pm

Photos would help: otherwise, it's like looking for advice on an ailment on the net instead of going to see a doctor Wink

The whole tree, and details: leaves, twigs, "cankers"...

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Re: Root rot or fungal attack in japanese maple

Post  JimLewis on Sat Jul 16, 2011 9:00 pm

Look up Phytophthora wilt. That's what it sounds like to me.

No cure that I've ever heard of.

Sorry.

_________________
Jim Lewis - lewisjk@windstream.net - Western NC - People, when Columbus discovered this country, it was plumb full of nuts and berries. And I'm right here to tell you the berries are just about all gone. Uncle Dave Macon, old-time country musician

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Re: Root rot or fungal attack in japanese maple

Post  AlainK on Sat Jul 16, 2011 9:21 pm

JimLewis wrote:Look up Phytophthora wilt. That's what it sounds like to me.

No cure that I've ever heard of.

Sorry.

Yep.

I didn't dare to say. Hard times...

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Re: Root rot or fungal attack in japanese maple

Post  jonathan on Wed Jul 27, 2011 4:20 am

Thank you gentlemen for your responses...I am treating the tree with a copper fungicide for anthracnose. I have recently learned that Neem Oil sprays aren't recommended for japanese maples. What would anyone recommend as a general, weekly or monthly spray for sensitive species like the japanese maple?

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Re: Root rot or fungal attack in japanese maple

Post  jonathan on Wed Jul 27, 2011 4:22 am

I forgot to mention...I did send a branch to the chicago botanical garden and they diagnosed the problem...we'll see how this goes...

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