Journal of Phytopathology (2018) 166, 386-395

Yue Pan, Hui Ye, Jun Lu, Peng Chen, Xu-Dong Zhou, Min Qiao and Ze-Fen Yu (2018)
Isolation and identification of Sydowia polyspora and its pathogenicity on Pinus yunnanensis in Southwestern China
Journal of Phytopathology 166 (6), 386-395
Abstract: Sydowia polyspora occurs often as an epiphyte or endophyte of conifers and is widely distributed around the world. It is also reported as a fungus associated with bark beetles. In this study, based on ITS sequence data and morphological characteristics, 14 strains collected from the beetle bodies and galleries of Tomicus minor and Tomicus yunnanensis infesting Pinus yunnanensis in Southwestern China were identified as S. polyspora. To assess the virulence of S. polyspora to P. yunnanensis, pathogenicity tests were conducted by inoculating the fungus in the stems and on needles of P. yunnanensis. The results after 30 days showed that the lesion lengths in the phloem after inoculation with S. polyspora were significantly longer than for the control. In addition, the fungus caused partly distinct chlorisis or discolouration of needles 14 days after inoculation. This suggests that S. polyspora is able to colonize stem phloem and pine needles of P. yunnanensis and thus may cause secondary damages to this host after being spread with bark beetles.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Xudong Zhou

Research topic(s) for pests/diseases/weeds:
general biology - morphology - evolution
transmission/dispersal of plant diseases

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Tomicus minor	Pine (Pinus)	China (south)
	Sydowia polyspora	Pine (Pinus)	China (south)
	Tomicus yunnanensis	Pine (Pinus)	China (south)