First report of common bean (Phaseolus vulgaris) root rot caused by Plectosphaerella cucumerina in China.
In March 2016, root rot was observed on common bean (Phaseolus vulgaris) cv. Shuangqing 38 samples collected from a commercial farm in Sanya City, Hainan, China. The incidence of this disease in the field was approximately 30%. The symptoms included dwarf and yellowing aboveground; irregular, scaled, black-brown lesions on roots; and lack of lateral roots. The causal pathogen was isolated and identified as Monographella cucumerina based on morphological, molecular and pathogenicity analyses. This is thought to be the first report of M. cucumerina causing root rot of common bean in China.