armillaria management TCI mag May

[treevet]

Very good article with current info on "Armillaria Management In The Landscape" in new TCI mag. Touting RCX root collar excavation and antagonistic fungi Trichoderma, etc. in an attempt to control this rather common and extremely destructive plant disease.

Anyone else read this? Anyone had any success with the Trichoderma? I can think of half of a dozen client's trees that I am monitoring with this disease involvement. Mycologists at OSU respond by saying the tree is just dying and that is a natural part of the process and attempts at eradication or management are futile.

 

[D Mc]

Yes, good article. Have not had any experience using the laboratory versions of trichoderma.

As with mycorrhizae, I doubt the direct application will be more beneficial than the cultural alteration that creates a beneficial structure for their natural development. They need fresh material to decompose, as opposed to precomposted material.

http://en.wikipedia.org/wiki/Trichoderma

Dave

 

[treevet]

I like that word "symbiont". Be nice if all people were symbionts wouldn't it.

I see that trichoderma is marketed in the Netherlands under the name Trianum.

Wonder if a similar product is available in the US?

 

[Sunrise Guy]

Yeah, excellent article. I was just running it down to my guys, on the job, yesterday. I really like TCIA's mag better then ISA's. It just seems that TCIA's is more interesting, for the most part. Detective Dendro is cool, though, in ISA's mag.

 

[Boa07]

Very good article with current info on "Armillaria Management In The Landscape" in new TCI mag. Touting RCX root collar excavation and antagonistic fungi Trichoderma, etc. in an attempt to control this rather common and extremely destructive plant disease.

Anyone else read this? Anyone had any success with the Trichoderma? I can think of half of a dozen client's trees that I am monitoring with this disease involvement. Mycologists at OSU respond by saying the tree is just dying and that is a natural part of the process and attempts at eradication or management are futile.

Hi Dave,

I have not read the article but will try and get a copy...we recommend and use a commercial product for the treatment of root pruning injuries that contains a combination of Trichoderma species, T. harzianum, T. lignorum, and T. koningii. These have certainly proved in research trials to be highly competitive against a number of wood decay fungi. I have not myself read any research testing the impact of Trichoderma sp against armillaria.

Something that is very often forgotten or overlooked is the fact that Trichoderma cannot displace the wood decay fungi from within the wood tissues, its effects are most significant at the point/area of application and contact...hence their application onto recent injury sites.

I would agree that the degree to which any antagonistic fungal application will be effective in slowing or halting an established wood decay fungi has more to do with broader alterations in the health and vigour of the host than anything else.

I have certainly anecdotally personally seen treatments halt and retard fruiting body production, but I would not suggest that such observations reflect a significant reduction on the impact of the wood decay fungi on the host tree.

 

[treevet]

I have not myself read any research testing the impact of Trichoderma sp against armillaria.

You will when you get that art. Sean. I am surprised they don't send them to you thru being a CA and ISA'er.

Something that is very often forgotten or overlooked is the fact that Trichoderma cannot displace the wood decay fungi from within the wood tissues, its effects are most significant at the point/area of application and contact...hence their application onto recent injury sites.

The art. touts the treatment and cultural improvements to make the most significant gains. I surmise the cultural practices aid in the tree's improved energy stores and subsequent compartmentalization to fight off the embedded pathogens themselves.

I would agree that the degree to which any antagonistic fungal application will be effective in slowing or halting an established wood decay fungi has more to do with broader alterations in the health and vigour of the host than anything else.

agreed....but gains in vitality are often difficult in very mature specimens IMO.

I have certainly anecdotally personally seen treatments halt and retard fruiting body production, but I would not suggest that such observations reflect a significant reduction on the impact of the wood decay fungi on the host tree.

There is some encouraging research data in this article developed at the Bartlett Tree Research Lab. but again the biggest gains are not from the antagonist Trichoderma treatments by themselves.

 

[Boa07]

Dave, I get the journal and Arborist News mailed to me but not TCI magazine, I used to have the site on the web where I could download past issues I'll have to try and rediscover that site as I do want to read the article.

 

[treevet]

Dave, I get the journal and Arborist News mailed to me but not TCI magazine, I used to have the site on the web where I could download past issues I'll have to try and rediscover that site as I do want to read the article.

 

[beastmaster]

I would like to read that article. I have read where its effective against pythium, phytophithora, and fusarium, but this is first Ive heard it may be effective against armillaria.

Trichoderma can colonize and be maintained with-in the rhizosphere as the plants grow providing protection for the life of the plant. Sounds great in theory.
Any way I could get that article? Beast.

 

[treeseer]

http://viewer.zmags.com/publication/a56feeeb#/a56feeeb/1

free for the viewing; this issue had 3 practice-oriented works, good stuff.

Title shoulda been "Armillaria Armageddon"

Osu has a dim view of arboirculture,,sou nds like.