UV disinfection of Fusarium oxysporum f. sp.cucumerinum in drain water from closed system

In this paper, an installation of UV disinfection was designed, and its efficacy against the Fusarium oxysporum f.sp.cucumerinum which is a kind of root-infecting pathogens, was tested in lab. The cultures of Fusarium oxysporum f.sp.cucumerinum were grown in potato destrose and introuced artificially to a tank taht contained enough water. By examining the number of spores grown in the plate of potato dextrose agar before and after being disinfected, it was found that Ultra-violet radiation is effective against Fusarium oxysporum f.sp.cucumerinum The pathogens were totally killed when the water (T_(10)=96.65%) flowed at 36L/min and the pathogen concentration was 6.87×10~(2)conidia/ml. Enen if the concentration of pathogen was 1.14×105conidia/ml, the spores could not survive when the water (T_(10)=95.42%) flowed at 36L/min. And when the water (T_(10)=11.58%) flowed at 7.9L/min and 35L/min, the disinfection rate was 81.31% and 50%, respectively.