UKTC Archive

Re: Verticillium wilt control in Norway maple

Subject: Re: Verticillium wilt control in Norway maple
From: Phil Dye
Date: Jan 17 2021 11:04:47
______________________________________________________________________
FLAC. The Seminar, 2021. 2 days, 8 lectures, 11 hours world-class CPD
-Philosophy of tree risk assessment. -Practical hazard identification
-Trees & decay fungi: a new approach. -THREATS
-Forensic entomology. -Decision-making & tree work for risk control
-Tree morphology & retrenchment pruning. -RAVEN
13-14 May, Forest of Arden Marriott; 20-21 May, Dundee Uni Botanics
Please email enquiries@xxxxx.uk.com to register interest
______________________________________________________________________

Possibly the same clone. Not planted at the same time time though. 

Sent from Yahoo Mail on Android 
 
  On Sat, 16 Jan 2021 at 18:03, Bill 
Anderson<anderson.arb.original@xxxxxx.com> wrote:   
______________________________________________________________________
FLAC. The Seminar, 2021. 2 days, 8 lectures, 11 hours world-class CPD
-Philosophy of tree risk assessment. -Practical hazard identification
-Trees & decay fungi: a new approach. -THREATS
-Forensic entomology. -Decision-making & tree work for risk control
-Tree morphology & retrenchment pruning. -RAVEN
13-14 May, Forest of Arden Marriott; 20-21 May, Dundee Uni Botanics
Please email enquiries@xxxxx.uk.com to register interest
______________________________________________________________________

Are they all the same clone by any chance? Planted at the same time?

On Sat, 16 Jan 2021 at 12:09, Rupert Baker <rupert_baker@xxxxxxxx.co.uk>
wrote:

______________________________________________________________________
FLAC. The Seminar, 2021. 2 days, 8 lectures, 11 hours world-class CPD
-Philosophy of tree risk assessment. -Practical hazard identification
-Trees & decay fungi: a new approach. -THREATS
-Forensic entomology. -Decision-making & tree work for risk control
-Tree morphology & retrenchment pruning. -RAVEN
13-14 May, Forest of Arden Marriott; 20-21 May, Dundee Uni Botanics
Please email enquiries@xxxxx.uk.com to register interest
______________________________________________________________________

Hi Phil, thanks for the extra info; given what you've told me, I'm at a
loss, and unwilling to speculate on what might be done.  Can I suggest you
or the LA talk to the pathology section of Forest Research - they may have
some info or advice;  https://www.forestresearch.gov.uk/
The only - general - advice I'd give is to encourage growth n the
trees/reduce any environmental stresses - esp by weed control around their
bases, and irrigation in dry weather - and if on low-nutrient, crap
substrates, consider fertilisation, esp using organic or other fertilisers
with a wide range of trace elements; you could also think about soil
amelioration using decompaction/injection of mycorrhizzae/ fertilisers -
though the research on these is at best inconclusive.  It is a soil-borne
pathogen, so I'd also do a search of the literature to see if there are any
antagonistic fungi (along the lines of Trichoderma) that might help - dohh!
I've ended up giving advice anyway - best of luck

Rupert

-----Original Message-----
From: uktc-request@xxxxxx.tree-care.info On Behalf Of Phil Dye
Sent: 16 January 2021 10:27
To: UK Tree Care <uktc@xxxxxx.tree-care.info>
Subject: RE: Verticillium wilt control in Norway maple

______________________________________________________________________
FLAC. The Seminar, 2021. 2 days, 8 lectures, 11 hours world-class CPD
-Philosophy of tree risk assessment. -Practical hazard identification
-Trees & decay fungi: a new approach. -THREATS -Forensic entomology.
-Decision-making & tree work for risk control -Tree morphology &
retrenchment pruning. -RAVEN
13-14 May, Forest of Arden Marriott; 20-21 May, Dundee Uni Botanics Please
email enquiries@xxxxx.uk.com to register interest
______________________________________________________________________

Hi Rupert,
The trees are all semi to early mature. Some are riddled with it, others
showing just onset of the disease. As it's often the central branches that
seem affected, pruning them out is not an option either aesthetically or
structurally. They're all street trees so they need to be low risk AND look
nice! Best regards Phil

Sent from Yahoo Mail on Android

  On Wed, 13 Jan 2021 at 13:01, Rupert Baker<rupert_baker@xxxxxxxx.co.uk>
wrote:
  ______________________________________________________________________
FLAC. The Seminar, 2021. 2 days, 8 lectures, 11 hours world-class CPD
-Philosophy of tree risk assessment. -Practical hazard identification
-Trees & decay fungi: a new approach. -THREATS -Forensic entomology.
-Decision-making & tree work for risk control -Tree morphology &
retrenchment pruning. -RAVEN
13-14 May, Forest of Arden Marriott; 20-21 May, Dundee Uni Botanics Please
email enquiries@xxxxx.uk.com to register interest
______________________________________________________________________

Hi Phil, how big are the trees;  if ~recently planted nursery stock, that
is where the disease came from - the nursery -; if older, I don’t know -
but it can show several years after planting. I had trees grow out of it;
and the risk with pruning is spreading the pathogen unless your sanitary
procedures are spot-on.
Atb
Rupert

-----Original Message-----
From: uktc-request@xxxxxx.tree-care.info On Behalf Of Brewster, Ian
Sent: 12 January 2021 14:06
To: UK Tree Care <uktc@xxxxxx.tree-care.info>
Subject: RE: Verticillium wilt control in Norway maple

______________________________________________________________________
FLAC. The Seminar, 2021. 2 days, 8 lectures, 11 hours world-class CPD
-Philosophy of tree risk assessment. -Practical hazard identification
-Trees & decay fungi: a new approach. -THREATS -Forensic entomology.
-Decision-making & tree work for risk control -Tree morphology &
retrenchment pruning. -RAVEN
13-14 May, Forest of Arden Marriott; 20-21 May, Dundee Uni Botanics Please
email enquiries@xxxxx.uk.com to register interest
______________________________________________________________________

Understanding how trees become infected with this disease, the vector and
how its spread might help with a plan of action.
With Elm disease cutting the branch with symptoms (discoloration of
foliage/shepherds crook) deep below the visible disease into clean wood
with wounds showing no staining should arrest further ingress.
I hear someone recently had lopped the top of an Ash tree with Chalara and
appeared to respond well with new growth, albeit looking somewhat different.
An expensive operation for 60 Norway maple trees but ....
Understanding how trees become infected with this disease, the vector and
how its spread might help with a plan of action.
With Elm disease cutting the branch with symptoms (discoloration of
foliage/shepherds crook) deep below the visible disease into clean wood
with wounds showing no staining should arrest further ingress.
I hear someone recently had lopped the top of an Ash tree with Chalara and
appeared to respond well with new growth, albeit looking somewhat different.
An expensive operation for 60 Norway maple trees but ....

-----Original Message-----
From: uktc-request@xxxxxx.tree-care.info 
<uktc-request@xxxxxx.tree-care.info>
On Behalf Of Phil Dye
Sent: 12 January 2021 13:49
To: UK Tree Care <uktc@xxxxxx.tree-care.info>
Subject: Verticillium wilt control in Norway maple

______________________________________________________________________
FLAC. The Seminar, 2021. 2 days, 8 lectures, 11 hours world-class CPD
-Philosophy of tree risk assessment. -Practical hazard identification
-Trees & decay fungi: a new approach. -THREATS -Forensic entomology.
-Decision-making & tree work for risk control -Tree morphology &
retrenchment pruning. -RAVEN
13-14 May, Forest of Arden Marriott; 20-21 May, Dundee Uni Botanics Please
email enquiries@xxxxx.uk.com to register interest
______________________________________________________________________

Hi all,
Does anyone know of any effective control measures for Verticillium
dahliae  in Norway maples other than pruning out the deadwood?
I have a client with 150 Norway maples of which 60 have symptoms of
V.dahliae to some degree or other. I'm looking for an alternative to
felling. Best regards

Phil


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NPS
  -----Original Message-----
From: uktc-request@xxxxxx.tree-care.info 
<uktc-request@xxxxxx.tree-care.info>
On Behalf Of Phil Dye
Sent: 12 January 2021 13:49
To: UK Tree Care <uktc@xxxxxx.tree-care.info>
Subject: Verticillium wilt control in Norway maple

______________________________________________________________________
FLAC. The Seminar, 2021. 2 days, 8 lectures, 11 hours world-class CPD
-Philosophy of tree risk assessment. -Practical hazard identification
-Trees & decay fungi: a new approach. -THREATS -Forensic entomology.
-Decision-making & tree work for risk control -Tree morphology &
retrenchment pruning. -RAVEN
13-14 May, Forest of Arden Marriott; 20-21 May, Dundee Uni Botanics Please
email enquiries@xxxxx.uk.com to register interest
______________________________________________________________________

Hi all,
Does anyone know of any effective control measures for Verticillium
dahliae  in Norway maples other than pruning out the deadwood?
I have a client with 150 Norway maples of which 60 have symptoms of
V.dahliae to some degree or other. I'm looking for an alternative to
felling. Best regards

Phil


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