UKTC Archive

RE: Mulch, Fuel, Firewood; whatever?

Subject: RE: Mulch, Fuel, Firewood; whatever?
From: Booth, John
Date: Aug 01 2001 07:10:01

I agree entirely!

As a matter of interest we in the UK have six species of Armillaria.  They
vary greatly in their pathogenicity and some are I beleive considered
exclusively saprophytic. others parasitic.

-----Original Message-----
From: Scott Cullen []
Sent: 01 August 2001 01:40
To: UK Tree Care
Subject: Re: Mulch, Fuel, Firewood; whatever?

Hi guys.  I have to ask some questions here.  A few years ago I did some
admittedly very superficial research on the topic of Armillaria.  What I
recall from talking to mycologists was that while there may be some hpyer
aggressive strains, Armillaria is typically an opportunistic organism.  It's
all over the place, in many if not most forest soils,  but only effectively
colonizes host organisms which are both susceptible and stressed.  And I
think that means extraordinarily stressed, not just in a difficult urban
environment as opposed to idyllic woodland.

So is there something about UK environments that makes Armillaria a
universal killing organism just by its very presence?  I can certainly
appreciate NOT spreading the innoculum from a clearly infected stump or
trunk,  But the notion that simply spreading a chipped up fungal food source
around basically healthy trees will make them all suddenly prey to
Armillaria seems overstated.


-----Original Message-----
From: Alan Reeves <>
To: UK Tree Care <>
Date: Tuesday, July 31, 2001 7:38 PM
Subject: Re: Mulch, Fuel, Firewood; whatever?

--- wrote: > In a message dated
31/07/01 12:25:08 GMT Daylight
Yeah, my brain mills these things over and concludes
something very similar
Alan. However two years? is that excessive? How long
does it take to rot down
thoroughly? I've left woodchips on the truck
overnight and had them steaming
thoroughly the next day. I heard ADAS were going to
do some research but then
heard no more.

Now when it comes to spreading a freshly prepared
inoculum from an Armillaria
riddled stump it sounds bad . . .

It's quite possible for rhizomorph material to produce
hyphae and thereby colonise suitable resources.
Petri dish studies will demonstrate this.
If I can combine two replies here, look at Alan Rayner
and Lynn Boddy's work/books/publications. It's all
good stuff.

Alan Reeves
27 Garstang Road North
01772 XXXXXX   07811 XXXXXX

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