TY - JOUR AU - PILOTTI, Massimo AU - DI LERNIA, Giovanni AU - LUMIA, Valentina AU - RICCIONI, Luca PY - 2014/04/18 Y2 - 2024/03/29 TI - Phytophthora cinnamon causing stem canker and root rot of nursery-grown Platanus × acerifolia: first report in the Northern emisphere JF - Phytopathologia Mediterranea JA - Phytopathol. Mediterr. VL - 53 IS - 1 SE - Research Papers DO - 10.14601/Phytopathol_Mediterr-11836 UR - https://oajournals.fupress.net/index.php/pm/article/view/5552 SP - 75-82 AB - Lethal stem and root cankers were observed in nursery-grown <em>Platanus</em> × <em>acerifolia</em> trees in Rome. Externally, canker lesions appeared as bluish or blackish areas starting from the stem base and extending upward. Inner bark was necrotised. In some cases an irregularly-shaped callus reaction attempted to heal the bark lesions. Black-stained necrosis affected the primary roots and the small branch roots to different degrees. The presence of <em>Ceratocystis platani</em> was excluded in the diseased trees. <em>Phytophthora</em>-like organisms were isolated from the altered tissue. Morphological and ITS-region-based analyses identified the isolates as <em>Phytophthora cinnamomi</em>. A pathogenicity test confirmed <em>P. cinnamomi</em> as the causal agent of the disease here defined as: stem canker and root rot of plane tree. This is the first report of <em>P. cinnamomi</em> in <em>Platanus</em> spp. in the Northern emisphere. ER -