50 or more

There are 50 or more reports for the following species as of January 17, 2024.

Report numbers for species do not provide an assessment of the frequency of failure for the species (i.e., how often a species fails relative to its occurrence in a population of trees). Rather, it is likely the data reflect the relative abundance of a species in the areas from which reports are being received. See CTFRP Statistics/Origin of Reports. Also, see Failure Photos for examples of root, trunk and branch failures of the 50 or more group.

Quercus agrifolia	coast live oak	767
Pinus radiata	Monterey pine	580
Cupressus macrocarpa (Hesperocyparis)	Monterey cypress	544
Eucalyptus globulus	blue gum	368
Quercus lobata	valley oak	350
Pinus pinea	Italian stone pine	191
Liquidambar styraciflua	sweet gum	168
Fraxnus velutina	Modesto ash	148
Quercus kelloggii	CA black oak	148
Sequoia sempervirens	coast redwood	131
Acacia melanoxylon	blackwood acacia	124
Pinus halepensis	Aleppo pine	120
Quercus wislizeni	interior live oak	114
Eucalyptus sideroxylon	red ironbark	111
Ulmus parvifolia	evergreen elm	109
Pyrus calleryana	callery pear	102
Cedrus deodara	deodar cedar	91
Quercus chrysolepis	canyon live oak	86
Pseudotsuga menziesii	Douglas fir	86
Umbellularia californica	CA bay	79
Calocedrus decurrens	incense cedar	78
Pinus attenuata	knobcone pine	67
Eucalyptus camaldulensis	Red river gum	54
Eucalyptus viminalis	Manna Gum	56
Quercus douglasii	blue oak	51