Ongoing research

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.

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.

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.

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.

2026 WTFD Regional MeetingThursday January 15, 20269:00AM to 3:30 PMFiloli Center, Woodside CA            

Report Forms and Manuals Forms and ManualsITFD User Guide TF form...

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

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...

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...

Post your comment or question here. Archived questions and answers from the old web site are available.