Archive Nut, Prune and Olive Programs

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

Eucalyptus globulus 2014

Eucalyptus globulus (blue gum) Structural Failure Profile Western Arborist Magazine Winter 2014 Euc globulus 2014...
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Western Tree Failure Database/California Tree Failure Report Program: Page

Counties and Numbers

Counties and NumbersA look at the counties the reports are coming from as of March 17, 2026Over 1000: San Francisco 2996, Alameda 1780, San Mateo1558, Santa Clara 1277500-999:, Contra Costa 664, Los Angeles 579, Napa 529100-499: Marin 446, Sacramento 371, Sonoma 322, Shasta 311, Ventura 307, El Dorado 283,…
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Western Tree Failure Database/California Tree Failure Report Program: Page

Pinus pinea 2015

Italian stone pine from the Fall 2015 issue of Western Arborist. Thanks to WCISA and Western Arborist Magazine.
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Western Tree Failure Database/California Tree Failure Report Program: Page

Aptos microburst

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

Montery cypress September 2014

Monterey cypress, Hesperocyparis macrocarpa (Cupressus macrocarpa) failure profile. Published in Western Arborist magazine Fall 2014.
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Western Tree Failure Database/California Tree Failure Report Program: Page

Quercus agrifolia 2014

Coast live oak failure profile published in Western Arborist magazine Summer 2014. Thanks to WCISA and Western Arborist.
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Western Tree Failure Database/California Tree Failure Report Program: Page

Losing a Giant

12/19/13. Pacific Horticulture Society published an article about a liquidambar limb failure made especially interesting by the author's telling of the story. Here is the link.
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Western Tree Failure Database/California Tree Failure Report Program: Page

Quercus kelloggii

California black oak branch failure Photo: K. Jones black oak trunk failure at ground level Photo: J. Benassini black oak trunk failure Photo: J. Benassini black oak high codominant trunk failure Photo: J.
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