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International Journal of Agricultural Research
Year: 2007  |  Volume: 2  |  Issue: 8  |  Page No.: 687 - 695

Fusarium Crown and Root Rot of Tomato and its Chemical Control

Khaled Hibar, Mejda Daami-Remadi, Fakher Ayed and Mohamed El Mahjoub    

Abstract: Fusarium oxysporum f. sp. radicis-lycopersici (FORL) is a new emerging pathogen in Tunisia. It causes Fusarium crown and root rot (FCRR) of tomato. Being a new disease, no control methods are available. Therefore, looking for a solution to this pathogen is required. In this study, the efficacy of some chemical fungicides to suppress FORL was evaluated in vitro, in growth chamber as well as under greenhouse conditions. In in vitro tests, all fungicides inhibited mycelial growth of FORL at 75 to 90% with the exception of maneb which entailed the lowest growth inhibition estimated at 40%. Under growth chamber trials, with the exception of benomyl, the other tested fungicides (Hymexazol, Hydroxyquinolin, Sodium Tetraborohydrate Decahydrate, Oxyquinolin and Flutriafol+Thiabendazole) have significantly reduced disease incidence. Under greenhouse conditions, results were more encouraging. Indeed, the use of Hymexazol reduces the percentage of dead plants at 6.4%. This study demonstrated the efficacy of some chemical fungicides in controlling FORL especially when they were incorporated to the culture substrate.

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