First report of anthracnose caused by Colletotrichum americae-borealis on greenhouse-grown licorice in China.
In June 2018, liquorice seedlings that were grown in 10-cm diameter pots with black soil in a commercial greenhouse in Lanzhou, China, were poorly established 3 weeks after planting. Symptoms of brown spots and sunken lesions were observed on the stem base of the seedlings, with 47% incidence. As the disease progressed, lesions on stems became necrotic, and nearly 26% of seedlings died. The Causal pathogen was isolated and identified as Colletotrichum americae-borealis based on morphological, molecular and pathogenicity analyses. This is thought to be the first report of C. americae-borealis causing anthracnose on greenhouse-grown liquorice in China and the first time C. americae-borealis is reported to cause anthracnose on a host other than lucerne.