First report of Nigrospora leaf blight on sugarcane caused by Nigrospora sphaerica in China.
In December 2016, during a survey in the field in Guangzhou (Guangdong, China), yellow and blighted symptomatic leaves were observed on symptomatic sugarcane (Saccharum) plants, and the colour of the leaf sheaths had turned red while the normal type should be white. In May 2017, this disease was also observed on sugarcane seedlings grown in the field and in the greenhouse, which were derived from seed pieces collected from symptomatic plants in the field, showing that it was a seedborne disease. Based on morphological characteristics, DNA sequence analysis and pathogenicity tests, the causal agent was identified as N. sphaerica [Khuskia oryzae]. This fungus has been reported to cause leaf blight on blueberry in Argentina, sesame in China and tea in India. This is thought to be the first report of Nigrospora leaf blight caused by N. sphaerica on sugarcane in China.