Goji (Lycium barbarum L.) is a Chinese-origin crop recently introduced in Italy. In October 2016, collar and root rots associated with severe twig dieback and foliage desiccation were observed on more than 30% of two-year-old Goji plants in an orchard in Bari province (Southern Italy). A Phytophthora sp. was consistently isolated by plating small pieces of collar and root decayed tissues on a BNPRAH selective medium (Erwin and Ribeiro 1996). All isolates formed white arachnoid colonies on potato-dextrose-agar, with papillate, persistent, pyriform to spherical sporangia of 31–48 × 22–34 μm in size, and globose chlamydospores of 20–32 μm in diameter, both terminal and intercalary singly formed. Oospores were not observed. Phenotypic characteristics matched those of Phytophthora nicotianae (Erwin and Ribeiro 1996).

First report of collar and root rot caused by Phytophthora nicotianae on Lycium barbarum

Cariddi, Corrado;Mincuzzi, Annamaria;Ippolito, Antonio;Sanzani, Simona Marianna
2018

Abstract

Goji (Lycium barbarum L.) is a Chinese-origin crop recently introduced in Italy. In October 2016, collar and root rots associated with severe twig dieback and foliage desiccation were observed on more than 30% of two-year-old Goji plants in an orchard in Bari province (Southern Italy). A Phytophthora sp. was consistently isolated by plating small pieces of collar and root decayed tissues on a BNPRAH selective medium (Erwin and Ribeiro 1996). All isolates formed white arachnoid colonies on potato-dextrose-agar, with papillate, persistent, pyriform to spherical sporangia of 31–48 × 22–34 μm in size, and globose chlamydospores of 20–32 μm in diameter, both terminal and intercalary singly formed. Oospores were not observed. Phenotypic characteristics matched those of Phytophthora nicotianae (Erwin and Ribeiro 1996).
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11586/227108
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