First report of Clerondendron yellow mosaic virus on golden dewdrop (Duranta erecta) in India.
During a survey in August 2013, yellow mosaic disease was observed on D. erecta growing in several public gardens/parks at Lucknow (Uttar Pradesh, India), with disease incidence of 80-90%. Infected plants exhibited severe yellow mosaic accompanied by upward leaf curl symptoms and stunting in severely infected plants compared to healthy plants. These symptoms reminiscent of a begomovirus infection reported previously on D. erecta in Pakistan and hence a similar infection was suspected. Twenty leaf samples from infected and four from healthy plants were collected from Goldmohar Park at Jankipuram, Lucknow. Based on the results of PCR assay and phylogenetic analyses of the nucleotide sequences, the causal agent was identified as Clerodendron yellow mosaic virus (ClYMV). Nucleic acid spot hybridization tests revealed the prevalence of ClYMV in 96.4% D. erecta plants. Begomoviruses are associated with leaf curl disease in D. erecta; Catharanthus yellow mosaic virus in Duranta repens and Tomato leaf curl New Delhi virus in D. repens from Pakistan. ClYMV has been reported on Bougainvillea peruviana and Clerodendron inerme in India, but this is thought to be the first report of natural occurrence of ClYMV on D. erecta in India.