Abstract: For exploring the green methods of soil disinfection, the disinfection effects of ozone water at different mass concentrations on three soil-borne pathogenic fungi, Fusarium oxysporum, Rhizoctonia solani, and Botrytis cinerea, were studied. The results showed that ozone water in the mass concentration range of 1.0~5.0 mg/L has certain sterilizing effect on the spores of the three pathogenic fungi. The mass concentration of ozone water is the main factor affecting the sterilization rate, whereas the treatment time has no significant effect on it. Increasing the mass concentration of ozone water and the frequency of irrigation can significantly enhance the sterilization rate of the three pathogenic fungi in the soil. Irrigation of the soil with ozone water can significantly reduce disease incidence in plants. However, it leads to growth inhibition, and the introduction of Trichoderma can eliminate this inhibition.

Key words: ozone water, soil-borne pathogenic fungi; sterilization rate;disease incidence;Trichoderma