Date: Fri, 20 Apr 2012 19:17:59 +0100
From: arborico@xxxxxxxxxxx.com
Subject: Re: [Bulk] Re: Pruning Induced Stress
To: uktc@xxxxxx.tree-care.info
"Gastrodia elata, G. cunninghamii and Galeola
septentrionalis, and of Monotropa uniforma in the family
Pyrolaceae. In some cases the fungus produces coils in the cells of the
orchid tubers, and
these coils are digested by the orchid as a source of nutrients. In some
cases,
also, the Armillaria rhizomorphs that infect the orchid are also
attached to tree roots. So the fungus essentially acts as a bridge,
supplying
nutrients to the orchid from a tree host - an indirect form of
parasitism."
I read somewhere.
________________________________
From: antony croft <hamadryad@xxxxxxxx.co.uk>
To: UK Tree Care <uktc@xxxxxx.tree-care.info>
Sent: Friday, 20 April 2012, 19:03
Subject: RE: [Bulk] Re: Pruning Induced Stress
As if by magic I had a very interesting conversation today regarding some
research involving a rare orchid that is parasitic on Armillaria! MMMMM now
being one for natural therapies this one really appeals. Im waiting for
some details after the discussion but will keep you posted!
an orchid that lusts for armillaria! awesome.
tony
Date: Fri, 20 Apr 2012 18:33:05 +0100
From: arborico@xxxxxxxxxxx.com
Subject: Re: [Bulk] Re: Pruning Induced Stress
To: uktc@xxxxxx.tree-care.info
________________________________
From: Ian Brewster <Ian.Brewster@xxxxx.gov.uk>
To: UK Tree Care <uktc@xxxxxx.tree-care.info>
Sent: Friday, 20 April 2012, 18:12
Subject: RE: [Bulk] Re: Pruning Induced Stress
Here's a thought; If the fungus prefers to be saprophytic, could the
'trigger' be prevented by baiting the fungus away from the tree with an
easy food source. A simple application of fresh wood chip as a thick
layer, narrower near the main stem, radiating outwards, to draw out the
infection preventing live/cambial death may do the trick. After 1-2 years
burn those chips, and destroy a high % of the fungal body. Add to the
soil a non-woody ameliorant within the rooting zone to encourage
beneficial antigens/organisms...sounds like a Jamie Oliver recipe', Only
problem here is how do you know whether your tree is mildly infected
prior to parasitism. This will need prediction based possibly by
observing nearby trees with typical HF symptoms to determine whether you
treat or not.
Ian
I can think of an in vitro, controlled, factorial investigstion to look
at these ideas; before attempting manipulative field investigations. Just
need to get hold of some resources and lab facilities; Glynn at Reading
Univ/ Bartlett lab has done some work with Armillaria. I imagine he has
some experience of negotiating the research grant process.
Dom
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