TY - JOUR AU - Jimenez Luna, Israel AU - Besoain, Ximena AU - Saa, Sebastian AU - Peach-Fine, Elena AU - Cadiz Morales, Fabiola AU - Riquelme, Natalia AU - Larach, Alejandra AU - Morales, Javiera AU - Ezcurra, Exequiel AU - Ashworth, Vanessa E.T.M. AU - Rolshausen, Philippe E. PY - 2022/03/25 Y2 - 2024/03/29 TI - Identity and pathogenicity of Botryosphaeriaceae and Diaporthaceae from Juglans regia in Chile JF - Phytopathologia Mediterranea JA - Phytopathol. Mediterr. VL - 61 IS - 1 SE - Articles DO - 10.36253/phyto-12832 UR - https://oajournals.fupress.net/index.php/pm/article/view/12832 SP - 79-94 AB - <p class="p1"><span class="s1">English walnut (<em>Juglans regia</em>) has become an important crop in Chile, representing 11.5% of the total area of fruit trees, surpassed only by grapevine. As the Chilean walnut industry rapidly expands, young orchards are at risk from the emergence of new fungal diseases. <em>Botryosphaeriaceae</em> and <em>Diaporthaceae</em> fungi have been recognized as main causes of wood diseases in walnut, with symptoms of dieback, canker, and blight. In winter 2017, samples were collected from different orchards in Valpara<strong>í</strong>so and Maule regions. Fungal isolates recovered were cultured, characterized morphologically, and identified using DNA sequence analyses. Three species (<em>Neofusicoccum</em> <em>parvum</em>, <em>Diplodia</em> <em>mutila</em>, <em>Diplodia</em> <em>seriata</em>) were characterized in <em>Botryosphaeriaceae</em> and two (<em>Diaporthe</em> <em>cynaroidis</em>, <em>Diaporthe</em> <em>australafricana</em>) in <em>Diaporthaceae</em>. Pathogenicity tests showed that <em>N. parvum</em> was the most aggressive species to walnut. This study confirmed the presence of pathogenic <em>Botryosphaeriaceae</em> and <em>Diaporthaceae</em> in <em>J</em>. <em>regia</em> that should be considered an increasing risk for the growing Chilean walnut industry.</span></p> ER -