<?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%">R.G. Pratt</style></author><author><style face="normal" font="default" size="100%">L.F. Roth</style></author><author><style face="normal" font="default" size="100%">Hansen, E.M.</style></author><author><style face="normal" font="default" size="100%">W.D. Ostrofsky</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Identity and pathogenicity of species of Phytophthora causing root rot of Douglas-fir in the Pacific Northwest</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%">1976</style></year></dates><volume><style face="normal" font="default" size="100%">66</style></volume><pages><style face="normal" font="default" size="100%">710-714</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;Three species of &lt;em&gt;Phytophthora&lt;/em&gt; previously unreported from Douglas-fir were isolated along with &lt;em&gt;P. cinnamomi&lt;/em&gt; from diseased trees from forest nurseries, forest outplanting sites, and seedling storage facilities in western Oregon and Washington. Two species were identified as &lt;em&gt;P. cryptogea&lt;/em&gt; and &lt;em&gt;P. drechsleri&lt;/em&gt; on the basis of sporangial and colony morphology, temperature-growth relations, and by comparisons with isolates of known identity. A third species, designated &lt;em&gt;Phytophthora&lt;/em&gt; sp. 1, did not correspond to any previously described species. &lt;em&gt;Phytophthora cinnamomi&lt;/em&gt; and &lt;em&gt;P. cryptogea&lt;/em&gt; were highly virulent on dormant and growing Douglas-fir seedlings in greenhouse tests. &lt;em&gt;Phytophthora drechsleri&lt;/em&gt; and &lt;em&gt;Phytophthora&lt;/em&gt; sp. 1 appeared to be less virulent. &lt;em&gt;Phytophthora cryptogea, P. drechsleri&lt;/em&gt; and &lt;em&gt;Phytophthora&lt;/em&gt; sp. 1 are similar to &lt;em&gt;P. lateralis,&lt;/em&gt; a destructive pathogen of Port-Orford-cedar, in growth at low temperatures and should therefore be regarded as potentially dangerous forest pathogens in cool, moist sites.&lt;/p&gt;</style></abstract></record></records></xml>