Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

Survey and incidence of bud blight disease of tomato in parts of Karnataka.

Abstract

Tomato [Solanum lycopersicum (Mill.) Wettsd] is the second most important vegetable crop of Peru-Ecuadar origin, after potato and belongs to the family Solanaceae. Bud blight disease on tomato caused by groundnut bud necrosis virus (GBNV) is one of the most important viral diseases of tomato in Karnataka and causes severe losses every year. This genus belongs to the family Bunyaviridae, and is the only member with viruses able to infect plants. Viruses belonging to this genus are transmitted exclusively by thrips (Thysanoptera: Thripidae) in a persistent and propagative manner. The survey was under taken on the incidence of the bud blight on tomato in parts of Belgaum, Dharwad, Haveri and Kolar district during summer season under irrigated tomato fields, the GBNV was present in all the places where survey was carried out. The disease incidence ranged from 12.5 to 94.4 per cent and maximum was noticed in Kyalanur (94.4%) of Kolar district and minimum was in Guledkoppa (12.5%) in Dharwad taluk. Among the varieties/hybrids surveyed, Abhinav recorded highest incidence and Utsav had relatively less incidence.