Not a good look on this maple
- Thread starter Ming dynasty
- Start date
Paradox
Imperial Masterpiece
Might be pseudomonas. If so, I dont think it can be saved and can spread to your other maples.
I'd remove it and dispose of it in the trash so it can't spread.
crataegus.com
I'd remove it and dispose of it in the trash so it can't spread.
Read This If You Grow Japanese Maple
This post is about a common bacterial disease called Pseudomonas syringae, which frequently affects Japanese maples yet is relatively easy to control. It is often misidentified as Verticillium wilt…
crataegus.com
Bonsai Nut
Nuttier than your average Nut
No bueno...
I'm not sure it can be saved, but at the bare minimum, get yourself a systemic bactericide and fungicide (the two often accompany each other).
I'm not sure it can be saved, but at the bare minimum, get yourself a systemic bactericide and fungicide (the two often accompany each other).
Dav4
Drop Branch Murphy
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My understanding is that Pseudomonas infections are generally fostered by root or bark trauma in the cool and wet spring months... mid August would be an odd time for such a condition to manifest itself. I can't say what's going on with the tree other than black bark means that the cambium beneath it is dead and the potential causes are many... trauma, infection, sun burn, etc., Contrary to what many think, a tree can recover from Pseudomonas but they have to grow very vigorously to do it. Ultimately, that means dialing in your husbandry. It wouldn't hurt to set it away from your other trees. Applying a fungicide and a H2O2 root drench wouldn't hurt- you'll need to search for the details on the drench here or elsewhere.
Ming dynasty
Shohin
I’ve been spraying it with copper and bayer 3-1 by monthly. Maybe it’s too cool where I’m keeping it
Ming dynasty
Shohin
Hope so, I separated it from the rest. Cause may come from where I place it in the yard. It’s cool and shades after 1-2pm
Paradox
Imperial Masterpiece
According to that article from Cragaegus, it's bacterial, not fungal. Fungicide will help mitigate any additional possible fungus infection but it will not help the pseudomonas infection
Dav4
Drop Branch Murphy
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Pseudomonas are bacterial organisms... the peroxide drench is potentially beneficial in treating it. The fungicide is to merely "cover all the bases".
Paradox
Imperial Masterpiece
Yep, I understand the peroxide drench will help with bacteria as it is anti bacterial.
I also stated that the fungicide would mitigate any possible fungal infections.
Just wanted to make sure the OP knows the black infection on the trunk is not fungal.
I definitely agree with doing a bit more to try and "cover the bases" so to speak
Ming dynasty
Shohin
I hit it with copper yday. I’ll get some peroxide in it today. Will that be a problem?
Ming dynasty
Shohin
Idk if it’s good news, but the black stuff faded away. It’s kind of pale now compare to before. Not sure if this will help y’all identify the cause.
bwaynef
Masterpiece
Copper doesn't list Pseudomonas control and if I recall, Bayer 3-in-1's fungicidal component is pretty weak, and I'm not positive it controls pseudomonas. Zerotol (peroxide based) and the Phyton## fungicides control it. Some biological fungicides do too.
