<?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%">Rytkönen, Anna</style></author><author><style face="normal" font="default" size="100%">Lilja, Arja</style></author><author><style face="normal" font="default" size="100%">Petäistö, Raija-Liisa</style></author><author><style face="normal" font="default" size="100%">Hantula, Jarkko</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Irrigation water and Phytophthora cactorum in a forest nursery</style></title><secondary-title><style face="normal" font="default" size="100%">Scandinavian Journal of Forest Research</style></secondary-title><short-title><style face="normal" font="default" size="100%">Scandinavian Journal of Forest Research</style></short-title></titles><dates><year><style  face="normal" font="default" size="100%">2008</style></year><pub-dates><date><style  face="normal" font="default" size="100%">10/2008</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://www.tandfonline.com/doi/abs/10.1080/02827580802419034#.UqfxDo25Ibg</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">23</style></volume><pages><style face="normal" font="default" size="100%">404 - 411</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;&lt;span class=&quot;single_highlight_class searchToken&quot;&gt;Phytophthora&lt;/span&gt; &lt;span class=&quot;single_highlight_class searchToken&quot;&gt;cactorum&lt;/span&gt;&lt;/em&gt; (Lebert and Cohn) J. Schröt is known to cause stem lesions on &lt;em&gt;Betula pendula&lt;/em&gt; Roth in Finnish &lt;span class=&quot;single_highlight_class searchToken&quot;&gt;nurseries&lt;/span&gt;. It has been suggested that &lt;span class=&quot;single_highlight_class searchToken&quot;&gt;irrigation&lt;/span&gt; &lt;span class=&quot;single_highlight_class searchToken&quot;&gt;water&lt;/span&gt; may be one source of infection. Therefore, &lt;em&gt;P. &lt;span class=&quot;single_highlight_class searchToken&quot;&gt;cactorum&lt;/span&gt;&lt;/em&gt; was baited from pond &lt;span class=&quot;single_highlight_class searchToken&quot;&gt;water&lt;/span&gt; used for &lt;span class=&quot;single_highlight_class searchToken&quot;&gt;irrigation&lt;/span&gt; and direct isolations were made from necrotic stem lesions in a &lt;span class=&quot;single_highlight_class searchToken&quot;&gt;forest&lt;/span&gt; &lt;span class=&quot;single_highlight_class searchToken&quot;&gt;nursery&lt;/span&gt; during the years 2004–2006. Morphological characteristics, as well as sequencing of the β-tubulin gene and ITS1 region, confirmed the isolates as &lt;em&gt;P. &lt;span class=&quot;single_highlight_class searchToken&quot;&gt;cactorum&lt;/span&gt;&lt;/em&gt;. The pathogen was present in the pond every year, but no diseased seedlings were found in 2005. The cultural and morphological characteristics showed high variation among the isolates, but it was not possible to identify the origins of the isolates according to them. In random amplified microsatellite (RAMS) analysis and DNA sequencing, the isolates from the pond and from the stem lesions were genetically similar, and the tested isolates were pathogenic. The results indicate that &lt;span class=&quot;single_highlight_class searchToken&quot;&gt;irrigation&lt;/span&gt; &lt;span class=&quot;single_highlight_class searchToken&quot;&gt;water&lt;/span&gt; is one source of stem lesion disease, and the microbe can overwinter in the pond. Two separate forms of the β-tubulin gene were detected in all the studied isolates, suggesting that the &lt;em&gt;P. &lt;span class=&quot;single_highlight_class searchToken&quot;&gt;cactorum&lt;/span&gt;&lt;/em&gt; here carries two β-tubulin gene loci in its genome.&lt;/p&gt;</style></abstract><issue><style face="normal" font="default" size="100%">5</style></issue></record></records></xml>