New record of Catharanthus yellow mosaic virus and a betasatellite associated with lethal leaf yellowing of Kalmegh (Andrographis paniculata) in Northern India.
In August 2012, during a survey in the northern parts of India, several Kalmegh (Andrographis paniculata) plants in Barabanki District of Uttar Pradesh showed typical virus-like symptoms along with prominent lethal leaf yellowing. The infected plants initially showed some chlorotic streaks, which later turned completely yellow, ultimately leading to premature death. The causal pathogen was identified as Catharanthus yellow mosaic virus (CYMV) and a betasatellite based on various genetic analyses. This is thought to be the first report of CYMV along with a betasatellite infecting A. paniculata in India.