<?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%">Hansen, E.M.</style></author><author><style face="normal" font="default" size="100%">Delatour, Claude</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Phytophthora species in oak forests of north-east France</style></title><secondary-title><style face="normal" font="default" size="100%">Ann. For. Sci.</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">1999</style></year></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://dx.doi.org/10.1051/forest:19990702</style></url></web-urls></urls><number><style face="normal" font="default" size="100%">7</style></number><volume><style face="normal" font="default" size="100%">56</style></volume><pages><style face="normal" font="default" size="100%">539-547</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&lt;/em&gt; species were surveyed from the end of 1997 through July 1998 in oak forests in NE France. Healthy (Amance) or declining (Illwald) forests were compared. The &lt;em&gt;Phytophthora&lt;/em&gt; population in both was diverse and locally abundant. At least eight species were present at Amance and six at Illwald. At Amance &lt;em&gt;Phytophthora&lt;/em&gt; species had a localized distribution in water and low-lying soils. At Illwald distribution was more uniform apparently due to flooding events. Most often recovered were &lt;em&gt;P. citricola, P. gonapodyides&lt;/em&gt; and &lt;em&gt;P. quercina. P. gonapodyides&lt;/em&gt; was ubiquitous in water and colonized leaf debris. &lt;em&gt;P. quercina&lt;/em&gt; was widely distributed in soil but not abundant, and was found in sites that did not otherwise appear to favor &lt;em&gt;Phytophthora&lt;/em&gt;. No correlation was detected between presence of &lt;em&gt;Phytophthora&lt;/em&gt; in soil and health of trees. Unusual combinations of environmental factors may be required for resident &lt;em&gt;Phytophthora&lt;/em&gt; to have a detrimental impact on oaks. © 1999 Editions scientifiques et médicales Elsevier SAS.&lt;/p&gt;</style></abstract></record></records></xml>