<?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%">Johnston, Steven F.</style></author><author><style face="normal" font="default" size="100%">Cohen, Michael F.</style></author><author><style face="normal" font="default" size="100%">Torok, Tamas</style></author><author><style face="normal" font="default" size="100%">Meentemeyer, Ross K.</style></author><author><style face="normal" font="default" size="100%">Rank, Nathan E.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Host Phenology and Leaf Effects on Susceptibility of California Bay Laurel to Phytophthora ramorum</style></title><secondary-title><style face="normal" font="default" size="100%">Phytopathology</style></secondary-title><short-title><style face="normal" font="default" size="100%">Phytopathology</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://apsjournals.apsnet.org/doi/10.1094/PHYTO-01-15-0016-R</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">106</style></volume><pages><style face="normal" font="default" size="100%">47 - 55</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;Spread of the plant pathogen &lt;em&gt;Phytophthora ramorum&lt;/em&gt;, causal agent of the forest disease sudden oak death, is driven by a few competent hosts that support spore production from foliar lesions. The relationship between traits of a principal foliar host, California bay laurel (&lt;em&gt;Umbellularia californica&lt;/em&gt;), and susceptibility to &lt;em&gt;P. ramorum&lt;/em&gt; infection were investigated with multiple &lt;em&gt;P. ramorum&lt;/em&gt; isolates and leaves collected from multiple trees in leaf-droplet assays. We examined whether susceptibility varies with season, leaf age, or inoculum position. Bay laurel susceptibility was highest during spring and summer and lowest in winter. Older leaves (&amp;gt;1 year) were more susceptible than younger ones (8 to 11 months). Susceptibility was greater at leaf tips and edges than the middle of the leaf. Leaf surfaces wiped with 70% ethanol were more susceptible to &lt;em&gt;P. ramorum&lt;/em&gt; infection than untreated leaf surfaces. Our results indicate that seasonal changes in susceptibility of &lt;em&gt;U. californica&lt;/em&gt; significantly influence &lt;em&gt;P. ramorum&lt;/em&gt; infection levels. Thus, in addition to environmental variables such as temperature and moisture, variability in host plant susceptibility contributes to disease establishment of &lt;em&gt;P. ramorum&lt;/em&gt;.&lt;/p&gt;</style></abstract><issue><style face="normal" font="default" size="100%">1</style></issue></record></records></xml>