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Morphological and molecular identification of Colletotrichum siamense , a novel leaf pathogen associated with Sterculia lanceolata recorded in China
Author(s) -
Zhang Yaowen,
Long Di,
Wang Jiawen,
Li Qiqin,
Wang Zhongwen,
Lin Wei,
Yuan Gaoqing
Publication year - 2020
Publication title -
journal of phytopathology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 60
eISSN - 1439-0434
pISSN - 0931-1785
DOI - 10.1111/jph.12909
Subject(s) - biology , blight , pathogen , botany , mycelium , ornamental plant , sheath blight , colletotrichum , pathogenicity , outbreak , microbiology and biotechnology , virology , rhizoctonia solani
Abstract Sterculia lanceolata , an important tropical woody plant, has high ornamental and medicinal value. To our knowledge, only brown root disease in this plant has been reported. In Nanning, Guangxi, China, an outbreak of leaf blight disease was observed on S. lanceolata in June 2019, with the leaf infection rate ranging from 80% to 100%. The disease seriously affected the leaves of trees and caused economic loss. Eight isolates were recovered from the infected leaves of different trees, and the pathogenicity was then determined by the methods of mycelial disc and conidial suspension, fulfilling Koch's postulates. According to the morphological and molecular biological characteristics of isolates, the pathogen causing leaf blight on S. lanceolata was identified as Colletotrichum siamense . Accurate identification of the pathogen provides a reliable basis for the control of the disease.