First report of dahlia latent viroid infecting dahlia in China.
Dahlia pinnata is a bushy, herbaceous ornamental plant widely cultivated in China. From June 2013 to September 2018, dahlia plants showing dwarfism were observed in some gardens including Beijing Botanical Garden, Beijing Zhongshan Park, and Xiangshan Park in Beijing, China. The causal pathogens were isolated and identified as Cucumber mosaic virus (CMV) and Dahlia latent viroid (DLVd) based on nucleotide sequences. This is thought to be the first report of DLVd infecting dahlia in China.