First report of Impatiens necrotic spot virus causing chlorotic ringspots on pepper in Yunnan, China.
During a survey of family-owned farms in 2015 in Tonghai County, Yunnan Province, southwest China, approximately 10% of plants in a farmer's field of Capsicum annuum (spicy pepper) were observed showing dwarfing, leaf chlorotic ringspots and distorted apical buds. The presence of Frankliniella occidentalis and symptoms observed on pepper plants suggested that the causal agent could be a Tospovirus in the family of Bunyaviridae. Symptomatic leaves of 2 samples were tested in the laboratory. The causal pathogen was identified as Impatiens necrotic spot virus (INSV) based on serological, molecular and pathogenicity analyses. This is thought to be the first report of INSV associated with a disease on pepper in Yunnan, China.