Fun with Maples

[Shogun610]

I'd start with some granular infuse fungicide or similar... maybe some daconil spray

I don’t have that stuff .. Im
Very reluctant to spray carcinogens

 

[Hack Yeah!]

I don’t have that stuff .. Im
Very reluctant to spray carcinogens

Fair enough, the peroxide will be a good start for you then

 

[yashu]

The granular Infuse is a systemic applied to the soil. No spray needed and pretty effective against a bunch of stuff. That said it works best either as a prophylactic seasonal application or catching the infection VERY early.

 

[Attmos]

View attachment 585584
This is the other one that died it keeps dying back I got rid of it .. sucks I sworn lime 100 on the group raw but whatever

When you create a forest, do you use clones, or are they wild?

 

[namnhi]

I

the one w the sudden black leaves died … idk what it was form but the other one is developing the same issues idk wtf to do .. hydrogen peroxide ?

My climate is not conducive to growing Japanese Maple. Almost every Spring, I have some weak ones turn black and died on me. I did Clegy Infuse a few times in the past years and didn't think it helped. I have big problem with fungus and the heat really did them in.
They should do well in your area so am surprise you have so much trouble with them. Maybe someone has dealt with this will give you some pointers.

 

[Shogun610]

When you create a forest, do you use clones, or are they wild?

These were all seedlings not clones

 

[Deep Sea Diver]

Whoa.

Sure looks like pseudomonas tip blight to me. Very frequent out here when folks prune JM in our west fall without spraying the tips with alcohol and sealing the cut sites. Clean your pruners well and then cut the trunk off branch well below the furthest extent of the black. Then spray and seal. Works for us about 80 percent of the time after infection,

If the tree is dying from the bottom up often this is caused by verticillium wilt.

Here’s a blog entry from Michael Hagedorn discussing the former. He got hit by this pretty hard back in the day

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

Good luck,
DSD sends

 

[Attmos]

These were all seedlings not clones

The whole forest thing mystifies me. It's like making a bonsai out of a bonsai. AND... expecting it all to grow on a slat, sometimes...

Pretty cool.

 

[Gabler]

I

the one w the sudden black leaves died … idk what it was form but the other one is developing the same issues idk wtf to do .. hydrogen peroxide ?

Last year, I ran into a problem with the trees in my grow-out area, which I keep under a sprinkler. The sprinkler is near a lilac bush, which developed some kind of blight and defoliated. The trees also developed some kind of blight. Systemic fungicide was not effective, after which I suspected a bacterial blight. I did a little research and learned that lilac can be highly susceptible to bacterial blight, and that was likely what was affecting my trees.

I looked up lilac bacterial blight just now, and it appears it's caused by a bacterium called Pseudomonas syringae pv. syringae. I cut off the diseased leaves and twigs and treated the plants with copper fungicide, which is also effective against bacteria. The trees then sent out another flush of healthy leaves.

I have removed the lilac bush, and I will be reducing my watering this spring to see if that helps.