Morphological and molecular identification of Colletotrichum siamense , a novel leaf pathogen associated with Sterculia lanceolata recorded in China,Journal of Phytopathology

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Morphological and molecular identification of Colletotrichum siamense , a novel leaf pathogen associated with Sterculia lanceolata recorded in China
Journal of Phytopathology ( IF 1.5 ) Pub Date : 2020-05-18 , DOI: 10.1111/jph.12909
Yaowen Zhang ₁ , Di Long ₁ , Jiawen Wang ₁ , Qiqin Li ₁ , Zhongwen Wang ₁ , Wei Lin ₁ , Gaoqing Yuan ₁

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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.

更新日期：2020-05-18

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