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International Journal of Agricultural Research
Year: 2007  |  Volume: 2  |  Issue: 12  |  Page No.: 1022 - 1029

In vitro and in vivo Suppression of Fusaruim oxysporum f. sp. radicis-lycopersici the Causal Agent of Fusarium Crown and Root Rot of Tomato by Some Compost Fungi

Amel Kerkeni, Mejda Daami-Remadi, Neji Tarchoun and Mohamed Ben Khedher    

Abstract: Aspergillus sp., Trichoderma viride strain 2 and T. viride strain 1 isolated from an animal manure compost are tested for their in vitro and in vivo antagonistic activity against Fusarium oxysporum f. sp. radicis-lycopersici, the causal agent of the Fusarium Crown and Root Rot of tomato. Dual culture experiments, observed after incubation at 25°C on PDA during 5 days, showed that all tested fungi significantly inhibited the mycelial growth of F. oxysporum f. sp. radicis-lycopersici comparatively to the untreated control. Inhibition varied from 25% for Trichoderma viride (strain 1) to 100% for Aspergillus sp. Competition for media was the predominant mechanism of action noted on PDA. In vivo, tomato plants (cv. Riogrande), simultaneously inoculated and treated individually by the compost fungi conidial suspensions (107 spores mL-1), showed reduced severity of the Fusarium Crown and Root Rot, when observed 30 days after transplantation, comparatively to the untreated control. The compost fungi T. viride (strain 1) was the most effective, it decreased severity of the disease by 48%.

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