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 Newsletter Articles:

May 2025Archived

 

Field picture submitted by Elizabeth Fichtner

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Western Tree Failure Database/California Tree Failure Report Program: Page

Pyrus calleryana

Callery pear branch failure photo: K. Jones As of July 5, 2010, there were 68 reports of Callery pear failures in the database. 34 of those were branch failures. 26 failed at the point of attachment. Decay was noted in 7 of the branch failures.
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Western Tree Failure Database/California Tree Failure Report Program: Page

Pinus pinea

Italian stone pine trunk failure at ground level Photo: C. Rippey Pinus pinea Data Summary 04/06/11 149 reports. Trunk 33%, Branch 31%, Root 36%. Mean age 42 years, mean DBH 31 inches, mean height 46 feet, mean crown diameter 44 feet.
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Western Tree Failure Database/California Tree Failure Report Program: Page

Eucalyptus globulus

blue gum root failure Photo: J. Scow As of August 12, 2010 there were 268 blue gum failure reports in the database. Root (44%), Branch (42%), Trunk (14%). Mean age: 62 years, mean DBH: 43 inches, mean height: 81 ft.
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Western Tree Failure Database/California Tree Failure Report Program: Page

Cupressus macrocarpa

Monterey cypress trunk failure Photo: K. Jones Monterey cypress trunk failure Photo: J. Petrini Monterey cypress trunk failure Photo: R. Leggitt Monterey cypress trunk failure Photo: R.
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Western Tree Failure Database/California Tree Failure Report Program: Page

Pinus halepensis

Aleppo pine root failure photo: J. Scow Aleppo pine trunk failure photo: M. Burdzinski Aleppo pine trunk failure photo: D. Hall Aleppo trunk failure Photo: E. Slowik Aleppo pine branch failure Poto: R. Loucks Aleppo pine branch failure photo: J.
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Western Tree Failure Database/California Tree Failure Report Program: Page

A Twenty Year Look 2000/2010/2020

Data Summary comparisons: 2000,2010,2020 2000 2010 2020 Total Reports 2587 4887 6284 Top genera (% of total) Pinus 20.6 18.3 16.9 Quercus 19.1 21.5 23.4 Eucalyptus 14.6 12.4 12.5 Cupressus 12.9 9.8 8.6 Top species (% of total) Pinus radiata 13.5 10.3 8.8 Cupressus macrocarpa 11.9 9.1 7.
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Western Tree Failure Database/California Tree Failure Report Program: Page

News

May 2023 In the strangest winter since the start of our program. 109 root (whole tree failures)were reported in January and several more in late December 2022. This is just a fraction of similar failures state wide. January 2023 Not much new.
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Western Tree Failure Database/California Tree Failure Report Program: Page

Annual Meetings

2026 WTFD Regional MeetingThursday January 15, 20269:00AM to 3:30 PMFiloli Center, Woodside CA            
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Western Tree Failure Database/California Tree Failure Report Program: Page

Become a Cooperator

How to Become a Cooperator (to report a tree that has failed in California, and soon, Hawaii, Nevada and Arizona) It's easy.
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