<?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%">Scanu, B.</style></author><author><style face="normal" font="default" size="100%">Webber, J. F.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Dieback and mortality of Nothofagus in Britain: ecology, pathogenicity and sporulation potential of the causal agent Phytophthora pseudosyringae</style></title><secondary-title><style face="normal" font="default" size="100%">Plant Pathology</style></secondary-title><short-title><style face="normal" font="default" size="100%">Plant Pathol</style></short-title></titles><dates><year><style  face="normal" font="default" size="100%">2016</style></year><pub-dates><date><style  face="normal" font="default" size="100%">Jan-01-2016</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://doi.wiley.com/10.1111/ppa.12399http://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fppa.12399</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">65</style></volume><pages><style face="normal" font="default" size="100%">26 - 36</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;Since 2009 extensive dieback and mortality of &lt;em&gt;Nothofagus obliqua&lt;/em&gt;, associated with bleeding cankers on stems and branches, has been observed in the UK. The causal agent was identified as &lt;em&gt;Phytophthora pseudosyringae&lt;/em&gt;, based on morphological and analysis of the internal transcribed spacer (ITS) sequences. Between 2011 and 2013, a survey assessed the frequency and nature of these &lt;em&gt;P. pseudosyringae&lt;/em&gt; infections. Mature trees of &lt;em&gt;Nothofagus&lt;/em&gt; with stem lesions caused by &lt;em&gt;P. pseudosyringae&lt;/em&gt; were found across England, Scotland and Wales. Additional symptoms such as twig blight and leaf necrosis indicated that aerial infection was occurring. Besides &lt;em&gt;N. obliqua&lt;/em&gt;, other hosts regularly encountered included &lt;em&gt;Nothofagus alpina&lt;/em&gt;,&lt;em&gt; Fagus sylvatica&lt;/em&gt; and &lt;em&gt;Vaccinium myrtillus&lt;/em&gt;. In pathogenicity tests involving inoculation of logs, &lt;em&gt;P. pseudosyringae&lt;/em&gt; was shown to be an aggressive bark pathogen of &lt;em&gt;N. obliqua&lt;/em&gt; and &lt;em&gt;F. sylvatica&lt;/em&gt;, but significantly less aggressive on &lt;em&gt;N. alpina&lt;/em&gt;. Foliage susceptibility and sporulation tests showed marked differences between the six host species tested. Leaves of &lt;em&gt;N. obliqua&lt;/em&gt; and &lt;em&gt;V. myrtillus&lt;/em&gt; were highly susceptible. Leaves of &lt;em&gt;N. alpina&lt;/em&gt; were moderately susceptible, those of &lt;em&gt;Rhododendron ponticum&lt;/em&gt; slightly susceptible and those of &lt;em&gt;F. sylvatica&lt;/em&gt; not susceptible at all. High levels of sporulation were observed only on inoculated &lt;em&gt;N. obliqua&lt;/em&gt; and &lt;em&gt;V. myrtillus&lt;/em&gt; leaves. This suggests that &lt;em&gt;P. pseudosyringae&lt;/em&gt; may sporulate heavily on &lt;em&gt;N. obliqua&lt;/em&gt; foliage in the field and that this inoculum initiates the aerial lesions observed on the shoots, branches and stems. The results also suggest that &lt;em&gt;P. pseudosyringae&lt;/em&gt; has the potential to pose a serious threat to &lt;em&gt;N. obliqua&lt;/em&gt; and other &lt;em&gt;Nothofagus&lt;/em&gt; species in their Southern Hemisphere native ranges.&lt;/p&gt;</style></abstract><issue><style face="normal" font="default" size="100%">1</style></issue></record></records></xml>