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Abstract
The potential of ozonated water was investigated as an alternative to soil disinfectants in reducing the population densities of Fusarium oxysporum f. sp. lycopersici in artificially infested quartz sand and Kuroboku soil columns. Significant reductions in the population density were observed with dissolved ozone concentrations (DOCs) of 6 and 12 mg L−1 in infested quartz sand but not in infested Kuroboku soil. The results indicate that repetitive application of ozonated water with higher DOCs should be required for reducing the population density of F. oxysporum in soils with high content of organic substances and large surface area.
ACKNOWLEDGMENTS
The authors express appreciation to Kobe Steel, Ltd., Japan for supplying the electrolytically ozonated water generator. This work was supported in part by the Research Project for Utilizing Advanced Technologies in Agriculture, Forestry and Fisheries (Grant No. 1539).
Notes
10. Terazoe, H. “Control of Fusarium Wilt of Spinach by Using of Ozone Sterilizing System in Nutrient Flow Technique”, Central Research Institute of Electric Power Industry Report No. U00020, 20 pp (2001) (Japanese text with English abstract).