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Open AccessBrief Report

First Report of Root Rot Caused by Phytophthora bilorbang on Olea europaea in Italy

1
Council for Agricultural Research and Agricultural Economy Analysis, Research Centre for Olive, Citrus and Tree Fruit-Rende CS (CREA-OFA), 87036 Rende, Italy
2
Department of Agriculture, Food and Environment, University of Catania, 95123 Catania, Italy
3
Department of Agricultural Science, Mediterranean University of Reggio Calabria, 89122 Reggio Calabria, Italy
*
Authors to whom correspondence should be addressed.
These authors are equally contributed.
Plants 2020, 9(7), 826; https://doi.org/10.3390/plants9070826
Received: 30 May 2020 / Revised: 27 June 2020 / Accepted: 27 June 2020 / Published: 30 June 2020
Leaf chlorosis, severe defoliation and wilt associated with root rot were observed on mature olive trees cv. Nera di Gonnos in an experimental orchard at Mirto Crosia (Calabria, southern Italy). An oomycete was consistently isolated from rotten roots of symptomatic olive trees. It was identified as Phytophthora bilorbang by morphological characters and sequencing of Internal Transcribed Spacer (ITS) regions of ribosomal DNA (rDNA). Pathogenicity was verified by inoculating potted two-month-old rooted cuttings of Olea europaea var. Nera di Gonnos in a soil infestation trial. P. bilorbang was re-isolated from roots of symptomatic, artificially inoculated olive cuttings to fulfill Koch’s postulates. This is the first report of P. bilorbang on O. europaea L. and on a species of the Oleaceae family worldwide. View Full-Text
Keywords: root rot; Phytophthora; olive; leaf chlorosis; defoliation; wilt; molecular identification; morphological identification; ITS region root rot; Phytophthora; olive; leaf chlorosis; defoliation; wilt; molecular identification; morphological identification; ITS region
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MDPI and ACS Style

Santilli, E.; Riolo, M.; La Spada, F.; Pane, A.; Cacciola, S.O. First Report of Root Rot Caused by Phytophthora bilorbang on Olea europaea in Italy. Plants 2020, 9, 826.

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