A link to the story about Matteo Garbelotto’s work on Phytophthora ramorum and showing that the source in California is likely from ornamentals from a nursery. The work is to appear soon in Molecular Ecology but alas is not available yet.
A recent paper on updated Phytophthora phylogeny from Jamie Blair and co-authors is also out in FGB. They used genome sequences to determine additional markers for multi-locus sequencing and then sequenced and built trees from 82 taxa.