@article {PPA:PPA1961, title = {A new threat to UK heathland from Phytophthora kernoviae on Vaccinium myrtillus in the wild}, journal = {Plant Pathology}, volume = {58}, number = {2}, year = {2009}, pages = {393{\textendash}393}, publisher = {Blackwell Publishing Ltd}, issn = {1365-3059}, doi = {10.1111/j.1365-3059.2008.01961.x}, url = {http://dx.doi.org/10.1111/j.1365-3059.2008.01961.x}, author = {Beales, P. A. and Giltrap, P. G. and Payne, A. and Ingram, N.} } @article {1261, title = {Natural stem infection of Lawson cypress (Chamaecyparis lawsoniana) caused by Phytophthora ramorum}, journal = {New Disease Reports}, volume = {25}, year = {2012}, pages = {26}, url = {http://dx.doi.org/10.5197/j.2044-0588.2012.025.026}, author = {C.M. Brasier and Webber, JF} } @article {623, title = {Non-oak native plants are main hosts for sudden oak death pathogen in California.}, journal = {Cal Ag}, volume = {57}, year = {2003}, pages = {18-23}, abstract = {

The finding of Phytophthora ramorum {\textemdash} the pathogen that causes sudden oak death in four California native trees {\textemdash} on rhododendron in Europe led us to hypothesize that its host range in California{\textquoteright}s natural forests was much greater than previously suspected. In addition to the affected oak species, we have now identified an additional 13 species from 10 plant families that act as hosts for P. ramorum in California. Our data indicates that nearly all of the state{\textquoteright}s main tree species in mixed-evergreen and redwood-tanoak forests {\textemdash} including the coniferous timber species coast redwood and Douglas fir {\textemdash} may be hosts for P. ramorum. The broad host range of P. ramorum, the variability of symptoms among different hosts and the ability of the pathogen to disperse by air suggests that it may have the potential to cause long-term, landscape-level changes in California forests.

}, doi = {10.3733/ca.v057n01p18}, url = {http://ucanr.org/repository/cao/landingpage.cfm?article=ca.v057n01p18\&abstract=yes}, author = {Garbelotto, M. and Davidson, J. and K. Ivors and Maloney, P. and H{\"u}berli, D. and Koike, S. and Rizzo, D.} } @article {3997, title = {New insights into the survival strategy of the invasive soilborne pathogen Phytophthora cinnamomi in different natural ecosystems in Western Australia}, journal = {Forest Pathology}, volume = {43}, year = {2013}, month = {08/2013}, pages = {266{\textendash}288}, abstract = {

Despite its importance as one of the most notorious, globally distributed, multihost plant pathogens, knowledge on the survival strategy of Phytophthora cinnamomi in seasonally dry climates is limited. Soil and fine roots were collected from the rhizosphere of severely declining or recently dead specimens of 13 woody species at 11 dieback sites and two dieback spots and from healthy specimens of five woody species at four dieback-free sites in native forests, woodlands and heathlands of the south-west of Western Australia (WA). Phytophthora cinnamomi was recovered from 80.4, 78.1 and 100\% of tested soil, fine root and soil{\textendash}debris slurry samples at the 11 dieback sites, in some cases even after 18-month storage under air-dry conditions, but not from the small dieback spots and the healthy sites. Direct isolations from soil{\textendash}debris slurry showed that P. cinnamomi colonies exclusively originated from fine roots and root fragments not from free propa- gules in the soil. Microscopic investigation of P. cinnamomi-infected fine and small woody roots and root fragments demonstrated in 68.8, 81.3 and 93.8\% of samples from nine woody species the presence of thick-walled oospores, stromata-like hyphal aggregations and intracellular hyphae encased by lignitubers, respectively, while thin-walled putative chlamydospores were found in only 21.2\% of samples from five woody species. These findings were confirmed by microscopic examination of fine roots from artificially inoculated young trees of 10 woody species. It is suggested that (i) the main function of chlamydospores is the survival in moderately dry conditions between consecutive rain events and (ii) selfed oospores, hyphal aggregations, and encased hyphae and vesicles in infected root tissue of both host and non-host species are the major long-term survival propagules of P. cinnamomi during the extremely dry summer conditions in WA.

}, doi = {10.1111/efp.12025}, url = {http://onlinelibrary.wiley.com/doi/10.1111/efp.12025/abstract}, author = {T. Jung and Colquhoun, I. J. and Hardy, G. E. St. J.}, editor = {S. Woodward} } @article {611, title = {Non-lethal pathological infection of roots}, journal = {Nature}, volume = {191}, year = {1961}, pages = {615-616}, doi = {10.1038/191615a0}, url = {http://dx.doi.org/10.1038/191615a0}, author = {Newhook, F. J.} } @article {doi:10.1094/PDIS.2001.85.5.560A, title = {A new Phytophthora root disease of alder in Italy}, journal = {Plant Disease}, volume = {85}, number = {5}, year = {2001}, pages = {560-560}, doi = {10.1094/PDIS.2001.85.5.560A}, url = {http://apsjournals.apsnet.org/doi/abs/10.1094/PDIS.2001.85.5.560A}, author = {Santini, A. and Barzanti, G. P. and Capretti, P.} } @article {3951, title = {New pest response guidelines - Phytophthora species in the environment and nursery settings}, year = {2010}, pages = {253 pp.}, publisher = { USDA{\textendash}APHIS{\textendash}PPQ{\textendash}Emergency and Domestic Programs{\textendash}Emergency Management, Riverdale, Maryland}, url = {http://www.aphis.usda.gov/import_export/plants/manuals/emergency/downloads/nprg-genericphytophthoras.pdf}, author = {USDA-APHIS-PPD} }