First report of common bean (Phaseolus vulgaris) stem rot caused by Colletotrichum spaethianum in China.
In August 2017, stem rot was observed on common bean (Phaseolus vulgaris) cv. English Red plants in 2 experimental fields located in Kelan and Jingle Counties, Shanxi, China. The 2 fields had disease incidences of approximately 10 and 30%, respectively. The infected plants showed black-brown or tan lesions on the stems and petioles. At maturity, the stems showed cracking and rotting, and ultimately the whole plants wilted and died. The causal pathogen was isolated and identified as Colletotrichum spaethianum based on morphological, molecular and pathogenicity analyses. The sequences of ITS (accession no. MG888355) and ACT (accession no. MG877573) from 15 isolates were deposited in the GenBank. This is thought to be the first report of C. spaethianum causing stem and root rot of common bean in China.