Vol. 2, Issue 6 (2017)
Screening of biocontrol agent against tomato wilt disease
Author(s): A Pauline Fatima Mary, R Sagaya Giri
Abstract: Tomato is one of the most widely grown vegetable crops across the globe. It is an important source of minerals, vitamins, essential amino acids, sugars and dietary fibers. During the cultivation, tomato crop is susceptible to various kinds of disease and disorders. Among which wilt disease is one of the most severe disease on tomato crop resulting up to 90% yield loss. Fusarium oxysporum f. sp. lycoperscisi (Sacc.) is a causative organism of Fusarium wilt. This pathogen was isolated from infected tomato leaves and also identified by using standard manuals. In This present study, Eight Rhizosphere soil samples of different tomato crop fields from four districts of Tamilnadu were investigated to study the diversity of fungi. Antagonistic activity of some soil fungi against F. oxysporum were studied in in vitro dual culture technique. A total of 17 species belonging to 7 genera of fungi were isolated and characterized from eight different soil samples such as Aspergillus, Penicillium and Mucor, Curvularia, Rhizopus and Trichoderma. In the antagonistic activity, the species of Trichoderma viride and Aspergillus flavus showed maximum inhibition against the pathogen F. oxysporum which cause wilt disease.