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Monterey cypress failures

Subject: Monterey cypress failures
From: Nelda Matheny
Date: Mar 20 2012 15:58:19
Rupert,
The fruiting body I most commonly see on Cupressus macrocarpa in the San 
Francisco Bay Area is Laetiporus gilbertsonii, which causes a cubical brown 
rot.  The California Tree Failure Report Program collects information about 
tree failures (actually, trained evaluators collect the information and 
submit the data).  Jim summarized the data available in 2007 for 426 failures 
(below).  

Averages
        age             65 years.  almost all <100.  most 76 to 100.
        dbh             40 inches
        ht.             69 feet
        spread  42 feet

Location & defects
        Trunk   failures        73 trees (17%)  Associated conditions:  
Multiple trunks.  Dense crown.  Cracks/splits.
        Branch failures 203 trees (48%)  Associated conditions:  Heavy 
lateral branch.  
        Root failures   150 trees (35%)  Associated conditions:  Kinked 
girdling roots.  Dense crown.  Multiple trunks.  One-sided.  Failed portion 
dead.  

Location & decay (where decay recorded in failure evaluation n=419; doesn't 
necessarily mean failure occurred because of decay)
        Trunk           25 trees none / 45 with (64% of trunk failures)
        Branch  149 trees none / 51 with (25% of branch failures)
        Root            90 trees none / 59 with (40% of root failures)

Location & precipitation (where precipitation recorded in failure evaluation 
n=418)
        Trunk           17 none / 54 with
        Branch  36 none / 162 with
        Root            20 none / 129 with

For all failures where wind speed recorded (n=187)
        < 5 mph                 16% 
        5-25 mph                34%
        over 25 mph             50%

Most failures occurred during our storm season (Oct. - March), during wind 
and rain.

This program is now international and web-based 
(http://svinetfc2.fs.fed.us/natfdb/).  If you want to particpate (add to 
database or retrieve data), you must complete the training. Mike Ellison and 
Glynn Percival are ITFD trainers. It would be wonderful to have UK arborists 
participate more and broaden the species represented. The database is 
currently housed with the US Forest Service. As you might expect, it is 
under-funded. The ISA is conducting a needs assessment.  

Regards,
Nelda

Nelda Matheny
HortScience, Inc. | 325 Ray St. | Pleasanton, CA 94566
phone 925.484.0211 | fax 925.484.5096 | www.hortscience.com

Visit our website:  http://www.hortscience.com

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http://www.facebook.com/#!/pages/HortScience/117452618329442





-----Original Message-----
From: uktc-request@xxxxxx.tree-care.info 
[mailto:uktc-request@xxxxxx.tree-care.info] 
Sent: Monday, March 19, 2012 2:26 PM
To: uktc@xxxxxx.tree-care.info
Subject: Digest for list uktc 

Table of contents:

1. Oops. - andersonarb@xxxx.com
2. RE: Oops. - "Ian Brewster" <Ian.Brewster@xxxxx.gov.uk> 3. Re: Whole of 
Government Accounts - Highway Asset Valuation - andersonarb@xxxx.com 4. basal 
decay of Cupressus macrocarpa - "Rupert Baker" <rupert_baker@xxxxxxxx.co.uk> 
5. RE: basal decay of Cupressus macrocarpa - "Ian Brewster" 
<Ian.Brewster@xxxxx.gov.uk> 6. Re: Whole of Government Accounts - Highway 
Asset Valuation - "Scott Cullen" <dscottcul@xxxx.net> 7. Re: Oops. - 
andersonarb@xxxx.com 8. Re: Oops. - Jerry Ross <trees@xxxxxxxxxx.co.uk> 9. 
RE: basal decay of Cupressus macrocarpa - "David Lonsdale" 
<d.lonsdale2@xxxxxxxxxxx.com> 10. Re: Whole of Government Accounts - Highway 
Asset Valuation - andersonarb@xxxx.com 11. RE: Oops. - "David Evans" 
<david.evans@xxxxxxxxxxxx.co.uk> 12. Re: Whole of Government Accounts - 
Highway Asset Valuation - "Scott Cullen" <dscottcul@xxxx.net> 13. RE: basal 
decay of Cupressus macrocarpa - "Mark Hinsley" <markhinsley@xxxxxxxxxxx.info> 
14. Dutch Elm Disease - Jonathan Hazell <go2jonathan.hazell@xxxxxx.com> 15. 
RE: basal decay of Cupressus macrocarpa - "Ian May" 
<ian.may@xxxxxxxxx.gov.uk> 16. Re: Dutch Elm Disease - Ed 
<ehtreecare@xxxx.com> 17. RE: Dutch Elm Disease - "Howe, Ron" 
<Ron.Howe@xxxxxxxxxxx.gov.uk> 18. Re: Dutch Elm Disease - Jonathan Hazell 
<go2jonathan.hazell@xxxxxx.com> 19. Re: Dutch Elm Disease - 
rickards123@xxxxxx.com 20. Re: Dutch Elm Disease - Jerry Ross 
<trees@xxxxxxxxxx.co.uk> 21. Re: Dutch Elm Disease - Jerry Ross 
<trees@xxxxxxxxxx.co.uk> 22. RE: Dutch Elm Disease - "Jim Quaife" 
<jq@xxxxxxxxxxxxxxxxx.co.uk> 23. RE: Dutch Elm Disease - "Rupert Baker" 
<rupert_baker@xxxxxxxx.co.uk> 24. RE: basal decay of Cupressus macrocarpa - 
"Rupert Baker" <rupert_baker@xxxxxxxx.co.uk>




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