Research Note: Inactivation Efficiency of Ozonated Water for Fusarium oxysporum Conidia Under Hydroponic Greenhouse Conditions

Authors: Igura, Noriyuki; Fujii, Masatoshi; Shimoda, Mitsuya; Hayakawa, Isao

Source: Ozone: Science and Engineering, Volume 26, Number 5, October 2004 , pp. 517-521(5)

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Abstract:

Ozonated water was used for inactivation of Fusarium oxysporum conidia in sterilized water and inorganic soil-less nutrient medium at different treatment temperatures. F. oxysporum conidia were effectively inactivated in both water and nutrient media and the inactivation curves were almost same at 15°C, 25°C and 30°C. Approximate 4-log orders of F. oxysporum conidia were killed when the ozonated water with initial ozone concentration of 1.0 ppm had been used. The surviving curves, however, were characterized by a tailing-off effect, and the effect was related to the residual ozone concentration in the ozone treated suspensions.

Keywords: Ozone; Fusarium oxysporum; Greenhouse Conditions; Hydroponic Greenhouse; Agricultural Applications

Document Type: Research article

DOI: http://dx.doi.org/10.1080/01919510490507937

Affiliations: 1: Laboratory of Food Process Engineering, Department of Bioscience and Biotechnology, Faculty of Agriculture, Kyushu University, Fukuoka City, Fukuoka, Japan

Publication date: 2004-10-01