Volume 19 Part 1 Article 97: Mushroom tumor: A new disease on Flammulina velutipes caused by Ochrobactrum pseudogrignonense

Volume 19 Part 1 Article 97
Year 2016
Title: Mushroom tumor: A new disease on Flammulina velutipes caused by Ochrobactrum pseudogrignonense
Author: Zhipeng Wu, Weihong Peng, Xiaolan He, Bo Wang, Bingcheng Gan, Xiaoping Zhang

Abstract:
Mushroom tumor has become the main disease during the off-season cultivation of F. velutipes, while the causal organism has remained unknown. Once infected by the pathogen, F. velutipes mycelia form nodular lesions which stops the formation of primordia and fruiting bodies. In 2012-2014 in the off-season cultivation areas of northwest Sichuan, 30-40% of the yellow F. velutipes was affected during the first harvest which rose to more than 80% during second harvest. In 2013, factory cultivated white F. velutipes was also found to be affected in Sichuan, Fujian and Henan.

The present study was aimed at identifying the pathogen confirming its pathogenisity following Koch’s Postulates, characterizing it using morphological, physiological, biochemical and molecular features, and studying its current distribution.

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