First report of Colletotrichum dematium causing anthracnose on Lycopus lucidus in northeastern China.
Lycopus lucidus var. hirtus is a perennial medicinal herb that is widely cultivated in China. In August 2014, anthracnose-like symptoms were found on 3-year-old L. lucidus landrace in Zuojia County of Jilin Province and Huairen City of Liaoning Province in China. Irregular or subrotund black spots ranging from 1 to 6 mm in diameter were found on infected leaves and stems. The symptoms first appeared on older leaves and gradually spread to newer leaves. Multiple lesions merged to cover a larger area and eventually caused leaf wilting. Based on morphological characteristics, nucleotide sequence analysis and pathogenicity tests, the causal agent was identified as C. dematium. This is thought to be the first report of C. dematium causing anthracnose on L. lucidus in China.