Is this Pseudomonas syringae??

[99 Mile Creek]

Sorry for double post, but I wasn't getting any comments in the Maple forum and felt this fit better here.

I purchased a Sharp's Pygmy Japanese Maple today. Thought it was root rot, though I'm not so sure it was.

I do have a window to return this to the nursery and am hoping for a diagnosis or direction from anyone that has experience with this.

Can anyone ID this? Should I treat all my trees on that bench with 1 tsp 3% hydrogen peroxide/1 liter water?

I really don't mind returning it, but the worst thing is that I sat this right next to my other Japanese maples and am worried about it might spread. For some reason I feel that this and another tree were set aside from the others...and I'm thinking this might have been why.

 

[Deep Sea Diver]

…. Gosh…Already answered on the other thread.

 

[radhatter]

Based on DSDs response on the other thread it probably is and it probably isn’t a big deal. I think I had this this on my lilac last year. Cut back to remove it. Got rid of the infected plant matter. This year it’s happy, healthy, and blooming like it never happened. I would follow his advice about properly disinfecting and sealing the cuts though

 

[99 Mile Creek]

…. Gosh…Already answered on the other thread.

Just a bit of a panic post. Thanks for your responses, really. I have some work to do this morning.

 

[99 Mile Creek]

Based on DSDs response on the other thread it probably is and it probably isn’t a big deal. I think I had this this on my lilac last year. Cut back to remove it. Got rid of the infected plant matter. This year it’s happy, healthy, and blooming like it never happened. I would follow his advice about properly disinfecting and sealing the cuts though

I've been doing a deep dive into this issue and hear that it very much is a big deal. Some say it keeps dying back until the whole tree is dead. Some have had annual issues with the bacteria with the same tree. Some lose years of progress on a single bonsai...not to mention losing 20+ bonsai from it spreading. Not sure if we're discussing the same thing, but this seems to be absolutely devastating if it cannot be controlled. And it seems up for debate on if it can.

Not sure keeping this tree around my others longer than I have to is worth it.

 

[Jrmcmich]

Did you ask nursery about it? Wondering did you notice it when you bought it?

 

[99 Mile Creek]

Did you ask nursery about it? Wondering did you notice it when you bought it?

I was in a hurry at the nursery, being some ways from my home, and focused on comparing two of them to see which had the most potential for a front/nabari. I did not notice it until I was about to work on it at home. Even then, I didn't know about the bacteria. I thought it was root rot initially and thought the cure would be to simply do what I had intended, trimming roots and potting. There were a few roots that looked rotted, but only a few and not enough to convince me that that was the issue.

I plan to call them when they open to discuss it. I told them my plan to bonsai the tree -- even bought the pot from them -- and they had me make a customer account. After I said I really don't think I need to, they responded with (paraphrasing here), "This is an expensive tree, and if something happens to it, you can return/exchange." So, I made an account before the purchase. I would not have left the nursery with a tree in my possession, knowing that it had a contagious and deadly bacteria.

Much to learn in this hobby.

 

[penumbra]

This is from another post last April 2024.

I am resurrecting this thread because I have a group of two and three year old seedlings that appear to have this disease. I pulled 16 maple that have died or are dying, just within the last couple of weeks. A few more have wilted significantly in the past few days. I appreciate Leo's sage advice above but I wonder if others are having this issue. Has anyone used Phyton 35? It is recommended, but before I spend over a hundred bucks on an 8 ounce bottle I hope to get a bit more feedback.
These maples affected are a loss, and it is a darn shame because they were from a group of seeds representing at least a dozen cultivars and some of them were quite unique. I just want to prevent this crap from affecting my collection of JM cultivars that numbers about 60 with some hard to find varieties. Plus I have another 200 seedlings, layers and cuttings for some nice stock.

I did indeed end up with large losses but a couple sprays a week apart of H2O2 over all the maples and the surrounding areas seemed to have halted the progression. It did nothing to save any infected plants. This year it was a late freeze that did in many of my maples. They were leaved out and it hit about 24F. Lots of damage and many losses. I will be spaying peroxide again as a prophylactic but we are getting a bit of rain almost every day. This weekend looks good.

 

[99 Mile Creek]

This is from another post last April 2024.

I am resurrecting this thread because I have a group of two and three year old seedlings that appear to have this disease. I pulled 16 maple that have died or are dying, just within the last couple of weeks. A few more have wilted significantly in the past few days. I appreciate Leo's sage advice above but I wonder if others are having this issue. Has anyone used Phyton 35? It is recommended, but before I spend over a hundred bucks on an 8 ounce bottle I hope to get a bit more feedback.
These maples affected are a loss, and it is a darn shame because they were from a group of seeds representing at least a dozen cultivars and some of them were quite unique. I just want to prevent this crap from affecting my collection of JM cultivars that numbers about 60 with some hard to find varieties. Plus I have another 200 seedlings, layers and cuttings for some nice stock.

I did indeed end up with large losses but a couple sprays a week apart of H2O2 over all the maples and the surrounding areas seemed to have halted the progression. It did nothing to save any infected plants. This year it was a late freeze that did in many of my maples. They were leaved out and it hit about 24F. Lots of damage and many losses. I will be spaying peroxide again as a prophylactic but we are getting a bit of rain almost every day. This weekend looks good.

I saw that post. I was absolutely horrified. What a significant loss.

Thank you for the update. I'll definitely look into doing a spray/soak as a preventative. Thank you for the response.

Did you use 1 tsp/liter?

 

[penumbra]

Did you use 1 tsp/liter?

I use 1.5%. That is half and half peroxide from drug store and water. I have used 3% for cleaning up root root on a ficus.