First report of twig anthracnose on grapevine caused by Colletotrichum nymphaeae in China.
An anthracnose disease was observed on twigs of grapevine (Vitis vinifera cv. Red Globe) in several vineyards in Hubei Province, China in 2015. Typical symptoms were sudden wilting and dieback of twigs during the growing season. Dark brown lesions developed and expanded to large, necrotic lesions covered with black acervuli. Affected twigs turned completely brown, then collapsed and died. Symptomatic twig samples were collected. Based on morphological characteristics, nucleotide sequence analysis and pathogenicity tests, the causal agent was identified as C. nymphaeae. Several species of acutatum complex, namely C. acutatum, C. godetiae and C. fioriniae have been reported to be causing diseases in grapevine from Australia, Italy, Portugal and UK. This is thought to be the first report of C. nymphaeae causing anthracnose on grapevine, or of C. nymphaeae causing twig anthracnose in China.