Fusarium wilt of tomato caused by the fu is Fusarium oxysporum f.sp lycopersici is one of the most prevalent and destrutive disease of tomato in Varamin area. The mean percentage of infection during the period of 1983 and 1989 was 27.3 in tomato fields.In some places of Varamin area entire fields of tomato are killed before a crop can be harvested. This desease can att Dk tomato plant. at any age. Symdtoms of disease and morphology of the fungus were investigated in this paper. Laboratory experiments were conducted to evaluate the effect of 100 PPM concentration of 13 fungicides against the pathogen on PDA culture, The results indicated that Iprodion+ carbendazim,Benomyl and carbendazim reduced fungal growth at 100 percentage after lOdays. In the other experiment the concentrations of 0.1,1,10 and 100 PPM of Iprodion + carbendazim,Carbendazim and Benomyl were tested on PDA culture. The results shwod that, The concentration of 10 and 100 PPM of theses fungicides were The most effective.
The results of field experiment conducted with soil drench. of Iprodion + carbendazim,Carbendazim and Benomyl showed that,Benomyl at 10 PPM were the most effective followed by Iprodione + carbendazim and carbendazim.
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