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Identification of powdery mildew on Prunus rufoides in China, caused by Podosphaera prunigena

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  • Zhilong WANG,
  • Wen LI,
  • Yueqiu HE,
  • Feng LIU,
  • Kai FENG,
  • Liang LIU,
  • Tao FU,
  • Qi YE,
  • Guoliang WANG
Zhilong WANG
Ningbo City College of Vocational Technology, Ningbo Zhejiang, 315000
Wen LI
Ningbo City College of Vocational Technology, Ningbo Zhejiang, 315000
Yueqiu HE
Ningbo City College of Vocational Technology, Ningbo Zhejiang, 315000
Feng LIU
Ningbo City College of Vocational Technology, Ningbo Zhejiang, 315000
Kai FENG
Ningbo City College of Vocational Technology, Ningbo Zhejiang, 315000
Liang LIU
Ningbo City College of Vocational Technology, Ningbo Zhejiang, 315000
Tao FU
Ningbo City College of Vocational Technology, Ningbo Zhejiang, 315000
Qi YE
Ningbo City College of Vocational Technology, Ningbo Zhejiang, 315000
Guoliang WANG
College of Biological and Environmental Sciences, Zhejiang Wanli University, Ningbo Zhejiang, 315000
DOI: https://doi.org/10.36253/phyto-15560
Categories

Published 2024-12-15

Keywords

  • Erysiphaceae,
  • morphology,
  • molecular analysis,
  • taxonomy

How to Cite

[1]
Z. WANG, “Identification of powdery mildew on Prunus rufoides in China, caused by Podosphaera prunigena”, Phytopathol. Mediterr., pp. 367–373, Dec. 2024.

Copyright (c) 2024 Zhilong WANG, Wen LI, Yueqiu HE, Feng LIU, Kai FENG, Liang LIU, Tao FU, Qi YE, Guoliang WANG

Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 International License.

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Abstract

Prunus rufoides is a deciduous wild tree, native to China, which is also used as an ornamental. From late March to December in the years 2018 to 2023, P. rufoides plants growing in Siming Mountain (29°71’08”N, 121°15’12”E), Ningbo, Zhejiang Province, were severely affected by powdery mildew. The disease initially emerged in late March each year, and was characterized as white, irregular mycelial patches on the adaxial surfaces of young leaves. Between July and August, the powdery mildew colonies on affected parts of leaves disappeared, leaving only irregular yellow-brown spots. The disease recurred in September and persisted until late December. Chasmothecia containing asci and ascospores were observed on the leaves in December. Morphological analyses of the chasmothecia indicated a Podosphaera sp. as the causative agent. Molecular identification, based on the internal transcribed spacer (ITS) region (primers ITS4/ITS5) confirmed the identity of the pathogen as Podosphaera prunigena. Koch’s postulates were fulfilled by inoculation tests in which the same pathogen was identified from the inoculated leaf tissue. This study represents the first report confirming the powdery mildew disease on P. rufoides in China to be caused by P. prunigena.

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