Author Topic: Please help - what is this?  (Read 17744 times)

Kent2106

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Please help - what is this?
« on: December 14, 2014, 08:12 AM »
Hello all,
The second year in row I have discovered a fungus in my soil. It is not mycorrhizae. It is yellow, hairy with little (very hard) grains. I have attached a picture.  All my pines and other bonsais were effected last year and had been repotted. I did not use a fungicide etc. It is late spring here in South Africa and it seems to come back (accompanied by a pungent mushroom smell). The trees get full day sun and pots can get very warm at times.  The trees are not the strongest but seem ok. All of them are planted in a pumice/seramis//grit/bark mixture.
Should I use a systemic fungicide? And if yes which one without retarding the little mycorrhizae I have....?
I have shown some of this stuff to a local nursery but they can't help!
« Last Edit: December 14, 2014, 08:38 AM by Kent2106 »
 

Sorce

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Re: Please help - what is this?
« Reply #1 on: December 14, 2014, 09:47 AM »
More Saffas!

That's a tough one.

Sorce
 

Adair M

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Re: Please help - what is this?
« Reply #2 on: December 14, 2014, 09:53 AM »
I don't know what it is, but the problem is the pine bark in your soil mix. Eliminate it, and I bet the problem would go away.
 

J.Kent

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Re: Please help - what is this?
« Reply #3 on: December 14, 2014, 09:55 AM »
Why is it that when anyone sees something they don't understand, their immediate thought is to KILL IT!

If it doesn't seem to be affecting your trees, let it be.  

And just a thought:  Fungus seldom do well when water is scarce.  Could it be that your trees are wated too often -- especially at this time of year? ???
 

Sorce

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Re: Please help - what is this?
« Reply #4 on: December 14, 2014, 10:02 AM »
I was thinking the pine bark is likely allowing it.

Soil seems kind of thick. Too soily.

No pine, no grit, more pumice.?

 

Kent2106

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Re: Please help - what is this?
« Reply #5 on: December 14, 2014, 10:05 AM »
I don't know what it is, but the problem is the pine bark in your soil mix. Eliminate it, and I bet the problem would go away.

Eliminating the bark from the soil or the entire tree?  Repotting isn't an option now - any fungicide I could use?
 

Kent2106

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Re: Please help - what is this?
« Reply #6 on: December 14, 2014, 10:09 AM »
Why is it that when anyone sees something they don't understand, their immediate thought is to KILL IT!

If it doesn't seem to be affecting your trees, let it be.  

And just a thought:  Fungus seldom do well when water is scarce.  Could it be that your trees are wated too often -- especially at this time of year? ???
Experience tells me that the fungus can spread very quickly... Will keep the trees as dry as possible - let's see what happens. What strikes me that no one here has a clue what this is!
 

MatsuBonsai

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Re: Please help - what is this?
« Reply #7 on: December 14, 2014, 10:18 AM »
How often do you clean the top of your soil?  If you rake the top with angled tweezers you can remove a lot of gunk, pests, weeds, etc.
 

Kent2106

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Re: Please help - what is this?
« Reply #8 on: December 14, 2014, 10:32 AM »
I was thinking the pine bark is likely allowing it.

Soil seems kind of thick. Too soily.

No pine, no grit, more pumice.?


Hi Sorce,
i was under the impression that pine bark encourage myccorizia - that is why I mixed it in.  The only mediums available her in SA is grit, bark and soil. The pumice I had was a once off purchase.
There is no more thn 30% soil in the mix. Perhaps the pumice and seramis hold too mush water? The mix is otherwise free draining.
A local bonsai person told me to put an extra layer of soil on top during summer to avoid high temperatures in the pot...
 

Kent2106

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Re: Please help - what is this?
« Reply #9 on: December 14, 2014, 10:38 AM »
How often do you clean the top of your soil?  If you rake the top with angled tweezers you can remove a lot of gunk, pests, weeds, etc.
Hello John,
Thank you for your reply.
The surface is free of any weed, bugs etc. All trees had been repotted 4 months ago. I did put an extra layer of grit on top to avoid the temperature becoming too hot in the pot.  We are already we'll in the 30's and summer are easily in the 40's here.
 

DorianJF

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Re: Please help - what is this?
« Reply #10 on: December 14, 2014, 10:42 AM »
More Saffas!

That's a tough one.

Sorce
Hey Sorce - We have a saying here in South Africa that goes like this  - TIA - Meaning - This is Africa

Things get tough here.   ;D

Kent - I have never seen anything like that so I cannot help on that.  
All my pines and other bonsais were effected last year and had been repotted.
When you say all your bonsai were affected - In what way?  Was it only the soil that got the fungus or did your trees suffer (leaf loss , dying etc)

My thoughts is that if it was only the soil affected, then I would not worry to much about it except maybe just scratch it out until you have a clearer understanding?
« Last Edit: December 14, 2014, 10:51 AM by DorianJF »
 

MatsuBonsai

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Re: Please help - what is this?
« Reply #11 on: December 14, 2014, 10:49 AM »
Surface looks pretty dirty. Could be the components. Did you screen?  We don't typically use any organics in our soil.
 

Kent2106

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Re: Please help - what is this?
« Reply #12 on: December 14, 2014, 11:32 AM »


Kent - I have never seen anything like that so I cannot help on that.  
All my pines and other bonsais were effected last year and had been repotted.
When you say all your bonsai were affected - In what way?  Was it only the soil that got the fungus or did your trees suffer (leaf loss , dying etc)

My thoughts is that if it was only the soil affected, then I would not worry to much about it except maybe just scratch it out until you have a clearer understanding?
[/quote]
Hi Dorian,
no leafloss nor dying, just yellowish fungus throughout the soil/pot with very hard grains. The grains are solid and stay behind when the soil/fungus has dried out/up.  There is also a noticeable mushroom smell ( I guess the spores) when turning the soil. 
Thanks for you reply.

So none of you suggests to use a fungicide????
 

MatsuBonsai

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Re: Please help - what is this?
« Reply #13 on: December 14, 2014, 12:39 PM »
I wouldn't recommend using fungicide on the roots of JBP, no.
 

DorianJF

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Re: Please help - what is this?
« Reply #14 on: December 14, 2014, 01:23 PM »
I agree. I would also not use a fungicide. Especially if it is not causing any damage to you bonsai.