<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Fichtner, E. J.</style></author><author><style face="normal" font="default" size="100%">D. M. Rizzo</style></author><author><style face="normal" font="default" size="100%">Kirk, S.A.</style></author><author><style face="normal" font="default" size="100%">Webber, JF</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Root infections may challenge management of invasive Phytophthora spp. in U.K. woodlands</style></title><secondary-title><style face="normal" font="default" size="100%">Plant Disease</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2011</style></year></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://apsjournals.apsnet.org/doi/abs/10.1094/PDIS-03-10-0236</style></url></web-urls></urls><number><style face="normal" font="default" size="100%">1</style></number><volume><style face="normal" font="default" size="100%">95</style></volume><pages><style face="normal" font="default" size="100%">13-18</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;Because sporulation of &lt;em&gt;Phytophthora ramorum&lt;/em&gt; and &lt;em&gt;P. kernoviae&lt;/em&gt; on &lt;em&gt;Rhododendron ponticum&lt;/em&gt;, an invasive plant, serves as primary inoculum for trunk infections on trees, &lt;em&gt;R. ponticum&lt;/em&gt; clearance from pathogen-infested woodlands is pivotal to inoculum management. The efficacy of clearance for long-term disease management is unknown, in part due to lack of knowledge of pathogen persistence in roots and emerging seedlings. The main objectives of this work were to (i) investigate whether both pathogens infect &lt;em&gt;R. ponticum&lt;/em&gt; roots, (ii) determine the potential for residual inoculum of &lt;em&gt;P. kernoviae&lt;/em&gt; to infect &lt;em&gt;R. ponticum&lt;/em&gt; seedlings in cleared woodlands, and (iii) assess potential for &lt;em&gt;R. ponticum&lt;/em&gt; roots to support survival and transmission of &lt;em&gt;P. kernoviae&lt;/em&gt;. Roots of &lt;em&gt;R. ponticum&lt;/em&gt; were collected from both unmanaged and cleared woodlands and assessed for pathogen recovery. Both &lt;em&gt;P. ramorum&lt;/em&gt; and &lt;em&gt;P. kernoviae&lt;/em&gt; were recovered from asymptomatic roots of &lt;em&gt;R. ponticum&lt;/em&gt; in unmanaged woodlands, and &lt;em&gt;P. kernoviae&lt;/em&gt; was recovered from asymptomatic roots from seedlings in cleared woodland. Oospore production of &lt;em&gt;P. kernoviae&lt;/em&gt; was observed in naturally infected &lt;em&gt;R. ponticum&lt;/em&gt; foliage and in inoculated roots. Roots also supported &lt;em&gt;P. kernoviae&lt;/em&gt; sporangia production. The results of this study suggest that post-clearance management of &lt;em&gt;R. ponticum&lt;/em&gt; regrowth is necessary for long-term inoculum management in invaded woodlands.&lt;/p&gt;</style></abstract></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Fichtner, E. J.</style></author><author><style face="normal" font="default" size="100%">Lynch, S. C.</style></author><author><style face="normal" font="default" size="100%">D. M. Rizzo</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Survival, dispersal, and potential soil-mediated suppression of Phytophthora ramorum in a California redwood-tanoak Forest</style></title><secondary-title><style face="normal" font="default" size="100%">Phytopathology</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2009</style></year></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://apsjournals.apsnet.org/doi/abs/10.1094/PHYTO-99-5-0608</style></url></web-urls></urls><number><style face="normal" font="default" size="100%">5</style></number><volume><style face="normal" font="default" size="100%">99</style></volume><pages><style face="normal" font="default" size="100%">608-619</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><notes><style face="normal" font="default" size="100%">PMID: 19351257</style></notes></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Fichtner, E. J.</style></author><author><style face="normal" font="default" size="100%">D. M. Rizzo</style></author><author><style face="normal" font="default" size="100%">Kirk, S.A.</style></author><author><style face="normal" font="default" size="100%">Webber, JF</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Infectivity and sporulation potential of Phytophthora kernoviae to select North American native plants</style></title><secondary-title><style face="normal" font="default" size="100%">Plant Pathology</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">forest biosecurity</style></keyword><keyword><style  face="normal" font="default" size="100%">host susceptibility</style></keyword><keyword><style  face="normal" font="default" size="100%">invasive disease</style></keyword><keyword><style  face="normal" font="default" size="100%">Phytophthora kernoviae</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2011</style></year><pub-dates><date><style  face="normal" font="default" size="100%">04/2012</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://dx.doi.org/10.1111/j.1365-3059.2011.02506.x</style></url></web-urls></urls><publisher><style face="normal" font="default" size="100%">Blackwell Publishing Ltd</style></publisher><volume><style face="normal" font="default" size="100%">61</style></volume><pages><style face="normal" font="default" size="100%">224–233</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;&lt;em&gt;Phytophthora kernoviae&lt;/em&gt; exhibits comparable epidemiology to &lt;em&gt;Phytophthora ramorum&lt;/em&gt; in invaded UK woodlands. Because both pathogens have an overlapping geographic range in the UK and often concurrently invade the same site, it is speculated that &lt;em&gt;P. kernoviae&lt;/em&gt; may also invade North American (NA) forests threatened by &lt;em&gt;P. ramorum&lt;/em&gt;, the cause of Sudden Oak Death. This paper addresses the susceptibility of select NA plants to &lt;em&gt;P. kernoviae&lt;/em&gt;, including measures of disease incidence and severity on wounded and unwounded foliage. The potential for pathogen transmission and survival was investigated by assessing sporangia and oospore production in infected tissues. Detached leaves of &lt;em&gt;Rhododendron macrophyllum&lt;/em&gt;, &lt;em&gt;Rhododendron occidentale&lt;/em&gt; and &lt;em&gt;Umbellularia californica&lt;/em&gt;, and excised roots of &lt;em&gt;U. californica&lt;/em&gt; and &lt;em&gt;R. occidentale&lt;/em&gt; were inoculated with &lt;em&gt;P. kernoviae&lt;/em&gt; and percent lesion area was determined after 6 days. Leaves were then surface sterilized and misted to stimulate sporulation and after 24 h sporangia production was assessed. The incidence of symptomless infections and sporulation were recorded. All NA native plants tested were susceptible to &lt;em&gt;P. kernoviae&lt;/em&gt; and supported sporangia production; roots of &lt;em&gt;U. californica&lt;/em&gt; and &lt;em&gt;R. occidentale&lt;/em&gt; were both susceptible to &lt;em&gt;P. kernoviae&lt;/em&gt; and supported sporangia production. Oospore production was also observed in &lt;em&gt;U. californica&lt;/em&gt; roots. The results highlight the vulnerability of select NA native plants to infection by &lt;em&gt;P. kernoviae&lt;/em&gt;, suggest that symptomless infections may thwart pathogen detection, and underscore the importance of implementing a proactive and adaptive biosecurity plan.&lt;/p&gt;</style></abstract></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Fichtner, E. J.</style></author><author><style face="normal" font="default" size="100%">Lynch, S. C.</style></author><author><style face="normal" font="default" size="100%">D. M. Rizzo</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Detection, distribution, sporulation, and survival of Phytophthora ramorum in a California redwood-tanoak forest soil</style></title><secondary-title><style face="normal" font="default" size="100%">Phytopathology</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2007</style></year></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://apsjournals.apsnet.org/doi/abs/10.1094/PHYTO-97-10-1366</style></url></web-urls></urls><number><style face="normal" font="default" size="100%">10</style></number><volume><style face="normal" font="default" size="100%">97</style></volume><pages><style face="normal" font="default" size="100%">1366-1375</style></pages><language><style face="normal" font="default" size="100%">eng</style></language></record></records></xml>