Publications by authors named "Cameron Chee"
Article Synopsis
- A year-long forest health survey in Del Norte County resulted in the first detection of the pathogen Phytophthora ramorum and its EU1 clonal lineage in California.
- In July 2019, leaf samples from tanoaks and California bay laurels in Jedediah Smith State Park showed lesions indicative of Sudden Oak Death, leading to DNA testing that confirmed the presence of P. ramorum.
- Further genetic analysis matched the DNA sequences to known lineages of P. ramorum, confirming the presence of the NA1 lineage in the region.
Phenotypic and sequence data were used to characterize 28 isolates resembling Phytophthora megasperma from 14 host species in 2 plant production facilities and 10 restoration sites across the San Francisco Bay Area (California; USA). Size of the oogonia and DNA sequences (nuclear internal transcribed spacer (ITS) and mitochondrial cytochrome c oxidase subunit 1 (COX 1)) were compared, and sensitivity to mefenoxam and pathogenicity were measured. Based on ITS 61 % of isolates matched ex-type sequences of Phytophthora crassamura from Italy, and the remainder matched or were close to the P.
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