Identification of the pathogen causing white root rot of grapevine in Shanxi province
White root rot is one of the most important root diseases of grape.From 2021 to 2022,the symptoms of white mycelium on the surface of grape roots were observed in several grapevines in Shanxi Province,China,with the incidence of 26.74％.Symptomatic root samples were collected and taken back to the laboratory to isolate the fungi.In this study,twenty strains were obtained by single hyphal purification.Based on the morpho-logical characteristics and multi-gene(ITS,LSU and TUB2)phylogenetic analysis,these strains were identified as Rosellinia necatrix.To confirm the pathogenicity,the inoculation was performed by adding wheat seeds colonized by R.necatrix in the soil.The results showed that R.necatrix was pathogenic to the grape.To our knowledge,this is the first report of R.necatrix causing white root in Shanxi province,China.
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