Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

First report of natural occurrence of watermelon bud necrosis virus in round melon (Praecitrullus fistulosus) in India.

Abstract

Praecitrullus fistulosus is being cultivated and consumed widely in northern India for its nutritional value. In April-May 2018, nearly 80[%] of plants with symptoms resembling virus infection, such as chlorotic and necrotic spots on leaves and necrosis on buds, were observed in experimental plots of the research farm at ICAR-Indian Institute of Vegetable Research, Varanasi, Uttar Pradesh, India. Infected plants died before attaining the fruiting stage. Based on the symptoms observed on the infected plants and presence of thrips, infection of Orthotospovirus in symptomatic plants of round melon was suspected. The causal pathogen was isolated and identified as Watermelon bud necrosis virus (WBNV) based on sequence analysis of coat protein gene. This is thought to be the first report of natural occurrence of WBNV on P. fistulosus in India.