Phytophthora ramorum as the Cause of Extensive Mortality of Quercus spp. and Lithocarpus densiflorus in California

Plant Disease
David M RizzoS T Koike

Abstract

A new canker disease, commonly known as sudden oak death, of Lithocarpus densiflorus, Quercus agrifolia, Q. kelloggii, and Q. parvula var. shrevei in California is shown to be caused by Phytophthora ramorum. The pathogen is a recently described species that previously was known only from Germany and the Netherlands on Rhododendron spp. and a Viburnum sp. This disease has reached epidemic proportions in forests along approximately 300 km of the central coast of California. The most consistent and diagnostic symptoms on trees are cankers that develop before foliage symptoms become evident. Cankers have brown or black discolored outer bark and seep dark red sap. Cankers occur on the trunk at the root crown up to 20 m above the ground, but do not enlarge below the soil line into the roots. Individual cankers are delimited by thin black lines in the inner bark and can be over 2 m in length. In L. densiflorus saplings, P. ramorum was isolated from branches as small as 5 mm in diameter. L. densiflorus and Q. agrifolia were inoculated with P. ramorum in the field and greenhouse, and symptoms similar to those of naturally infected trees developed. The pathogen was reisolated from the inoculated plants, which confirmed pathogenicity.

References

May 13, 1999·Proceedings of the National Academy of Sciences of the United States of America·C M BrasierJ M Duncan
Aug 24, 2000·Fungal Genetics and Biology : FG & B·D E CookeC M Brasier
Jan 1, 2000·Plant Disease·Everett M HansenBarbara Ullian

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Citations

Oct 31, 2012·The Journal of Heredity·Richard S DoddZara Afzal-Rafii
Jun 10, 2011·Journal of the Royal Society, Interface·Adam KleczkowskiChristopher A Gilligan
Dec 16, 2017·IMA Fungus·Xiao YangChuanxue Hong
Sep 1, 2017·International Journal of Systematic and Evolutionary Microbiology·Wen-Wen LiWen-Xia Huai
Feb 9, 2005·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·B DybiecC A Gilligan
Nov 5, 2005·Applied and Environmental Microbiology·J A TomlinsonI Barker
Apr 24, 2007·Applied and Environmental Microbiology·J A TomlinsonN Boonham
Dec 17, 2017·Analytical and Bioanalytical Chemistry·Mitchel M McCartneyRichard M Bostock
Sep 23, 2020·PloS One·Sharifa G CrandallDenis S Willett
Apr 3, 2004·Letters in Applied Microbiology·P KongP A Richardson
Mar 24, 2005·Molecular Plant-microbe Interactions : MPMI·Thomas A RandallHoward S Judelson
Apr 1, 2008·Ecological Applications : a Publication of the Ecological Society of America·Ross K MeentemeyerJ Hall Cushman
Oct 24, 2008·Phytopathology·J M DavidsonD M Rizzo
Oct 24, 2008·Phytopathology·F H Tainter
Jan 8, 2009·Journal of the Royal Society, Interface·Bartłomiej DybiecChristopher A Gilligan
Apr 15, 2015·Phytopathology·Ebba K PetersonAlan Kanaskie
Aug 26, 2016·Proceedings. Biological Sciences·Laura L GoversTjisse van der Heide

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