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

Tree Links

International Society of Arboriculture WCISA: Western Chapter; International Society of Arboriculture ASCA - American Society of Consulting Arborists Forest Pathology and Mycology Laboratory Wood Decay Diagnostic Research Project SelecTree - A Tree Selection System for California (must have image lo...
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Western Tree Failure Database/California Tree Failure Report Program: Page

WTFD Statistics

1/8/2025 Report Count :6766 Most commonly reported genera : Quercus (1554), Pinus (1132), Eucalyptus (838), Hesperocyparis (348), Acacia (220) Next most commonly reported genera : Fraxinus (211), Ulmus (207), Liquidambar (169), Cedrus (142), Sequoia (131), Pseudotsuga (75), Calocedrus (72), Umbellul...
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Western Tree Failure Database/California Tree Failure Report Program: Page

Post a Question

Post your comment or question here. Archived questions and answers from the old web site are available.
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Western Tree Failure Database/California Tree Failure Report Program: Page

Species Profiles and Summaries

Species profiles will be added to this section as they become available. Also, included here are summaries of: Monterey pine, Pinus radiata, data for 1994 and 2010 Coast live oak, Quercus agrifolia, data for 1995, 1996, 2010 and 2014.
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Western Tree Failure Database/California Tree Failure Report Program: Page

Contact Information

Larry, Katherine and IgorKatherine Jones CTFRP Database Manager P.O. Box 725 Larkspur CA, 94977-0725 treefail@mac.com Dr. Larry Costello CTFRP Principal Investigator UCCE Horticulture Advisor Emeritus lrcostello@ucanr.edu or larryoracleoak@me.com Dr.
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