Inactivation effect of 10 compounds on Fusarium oxysporum f. sp. cubense and its toxin

Inactivation effect of 10 compounds with 4 different concentrations on banana wilt disease’s hyphal growth, conidial germination and banana wilt disease toxin produced by Fusarium oxysporum f. sp. cubense were studied. The results indicated that hyphal growth and conidial germination and toxin of Fusarium oxysporum f. sp. cubense were both inhibited by the different concentrations except NH4NO3, and at concentration of 2 to 5 g/L of CuSO4 and at concentration 5 g/L of FeSO4-7H2O, the inhibitory rates were both 100 %; at concentration of 5 g/L of EDTA·Na2, the inhibitory rate was 93.64 %; at concentration of 0.5 to 5 g/L of FeSO4-7H2O、(NH4)2SO4-FeSO4-6H2O,KMnO4,CuSO4, the average inhibitory rates were 97.73 %,97.07 %,90.98 %,90.39 % respectively. The inactive rates of CuSO4 and KI were the highest, when at concentration of 1 to 5 g/L and of 0.5 g/L of them, the inactive rates was 75 %、67.05 % respectively. At concentration of 0.5 g/L of EDTA·Na2,ZnSO4-7H2O and (NH4)2SO4-FeSO4-6H2O, the inactive rates were the best, reached 100 %,98 % and 93.99 % respectively.