Acta Agriculturae Zhejiangensis ›› 2024, Vol. 36 ›› Issue (3): 579-588.DOI: 10.3969/j.issn.1004-1524.20230859

• Plant Protection • Previous Articles     Next Articles

Identification and biological characteristics of pathogen causing branch dieback on Styphnolobium japonicum (L.) Schott

LUO Zhihan1(), LIU Pengfei1, YU Jun2, QI He3, CHEN Xiaoguang4, LOU Binggan1,*()   

  1. 1. Ministry of Agriculture and Rural Affairs Key Lab of Molecular Biology of Crop Pathogens and Insects, Institute of Biotechnology, Zhejiang University, Hangzhou 310058, China
    2. College of Plant Science, Tarim University, Alar 843399,Xinjiang, China
    3. Forestry and Grassland Administration of Bayingol Mongolian Autonomous Prefecture, Korla 841000, Xinjiang, China
    4. Landscaping Affair Center of Korla,Korla 841000, Xinjiang, China
  • Received:2023-07-13 Online:2024-03-25 Published:2024-04-09

Abstract:

Branch dieback of Styphnolobium japonicum (L.) Schott is a serious disease that has occurred in the southern Xinjiang in recent years. To identify the pathogen of branch dieback in S. japonicum and its biological characteristics, we collected the samples with typical symptoms and the pathogen were isolated and purified. Based on the pathogenicity tests, morphological and molecular identification, we confirmed that the pathogen is Neoscytalidium dimidiatum. The results of biological tests showed that the optimal conditions for mycelial growth of N. dimidiatum were PDA medium (pH 5.0) at 34 ℃. The spore production was optimal on PDA medium (pH 7.0-9.0) at 34 ℃. The best C&N sources for mycelial growth were mannose and beef extract, respectively, while peptone was best for sporulation. In contrast, mycelial growth and spore production rate decreased when xylose and sorbose were used as carbon sources and nitrate nitrogen and urea as nitrogen sources.

Key words: branch dieback of Styphnolobium japonicum (L.) Schott, pathogen identification, Neoscytalidium dimidiatum, biological characteristic

CLC Number: