Unhappy Oak

[Canal Navvy]

Is this a cause for concern?, it is not too far away from a rather special area of woodland.

[Tony Croft aka hamadryad]

Phytopthora? looks too much exudate for Armillaria sp, but that would be my first instinct

[Stephen Blair]

First signs of Firewood Itis:thumbdown:, put the poor thing out its misery mate:biggrin:

[Tony Croft aka hamadryad]

First signs of Firewood Itis:thumbdown:, put the poor thing out its misery mate:biggrin:

 

 

i have seen trees get over worse:001_tongue:

[Stephen Blair]

I have seem more not get over less

[treeseer]

i have seen trees get over worse:001_tongue:

I have seen trees get over much worse. It's all in the treatment.

 

Dead material removed from bleeding area (have you sounded with a mallet?), lesions scraped clean and cauterized, then drench general area with phosphite, or a fungicide if that sort of thing is allowed over there.

 

Remove and replace, soil under the infection. Strange location for lesions, being up the trunk but not visible near the base. But Pytophthora CAN go up the trunk, if there is nothing stopping it. Have you smelled the exudeate? If sour, it may be a bacterial infection that can be readily remedied.

If intestines try to ID Armillaria from that picture, then perhaps it is time for a high colonic.

Is that a fork at the top of that pic? that area seems especially worth inspecting.

 

that tree looks to be a long way from firewooditis. but we have not seen much of it.

Edited September 11, 2011 by treeseer

[pgkevet]

Just to ask:

 

What is the protocol if tree like that is considered doomed but is also a bat roost?

[Tony Croft aka hamadryad]

Ha ha, and no one mentions the fact if it was phtopthora it would not be extending up the butt! Armillaria, with my guts.

[Fungus]

Dead material removed from bleeding area (have you sounded with a mallet?), lesions scraped clean and cauterized, then drench general area with phosphite, or a fungicide if that sort of thing is allowed over there.

Remove and replace, soil under the infection. Strange location for lesions, being up the trunk but not visible near the base. But Pytophthora CAN go up the trunk, if there is nothing stopping it. Have you smelled the exudeate? If sour, it may be a bacterial infection that can be readily remedied.

If intestines try to ID Armillaria from that picture, then perhaps it is time for a high colonic.

 

So you still think, you can ascertain or exclude whether the oak has a bacterial infection, is suffering from SOD (Phytophthora cf. ramorum), has its living tissues invested with rhizomorphs of a parasitic Armillaria species, or is having symptoms of AOD, from just looking at some pictures and asking what the ooze smells like and you on top of that already know what treatment is needed without a proper and definite diagnosis ?

How about having a high colonic yourself instead of recommending it to "intestines".

[treeseer]

You two are like Abbott and Costello.

 

"So you still think, you can ascertain or exclude whether the oak has a bacterial infection, is suffering from SOD (Phytophthora cf. ramorum), has its living tissues invested with rhizomorphs of a parasitic Armillaria species, or is having symptoms of AOD, from just looking at some pictures and asking what the ooze smells like and you on top of that already know what treatment is needed without a proper and definite diagnosis"

 

1. That first part of that treatment regimen is diagnostic: sounding with a mallet indicates dead areas, and removing dead material can reveal pathogens or lack thereof. You are correct in that no one can ascertain or exclude anything based on OUR view, which is why I made no such claim.

 

The rest of it is a very general course of treatment for trunk infections, up to the mention of "OR" a fungicide, so let's set that aside.

what diagnostic steps would you recommend to the poster?

Do you think that sounding with a mallet indicates dead areas, and removing dead material can reveal pathogens or lack thereof?

What kind of samples should be extracted from a tree with those signs, to give to an expert for microscopic analysis? i've taken samples from the margins of the lesions on trees that looked like that, and had all kinds of tests run without a good ID, so I'd like to know more.

 

I agree that guessing with guts or any organ or prescribing specific products without adequate evidence is jumping the gun a bit.