ISHS Acta Horticulturae 698: VI International Symposium on Chemical and non-Chemical Soil and Substrate Disinfestation - SD2004
CONTROL OF SOILBORNE DISEASES IN GREENHOUSE CULTIVATION OF TOMATO WITH OZONE AND TRICHODERMA SPP. |
| Authors: | V.A. Bourbos, E.A. Barbopoulou |
| Keywords: | ozone, Trichoderma, soilborne disease control, Fusarium oxysporum, Pyrenochaeta lycopersici |
| Abstract:
Ozone is widely used for the elimination of microorganisms from drinking water and swimming pools. Efforts were made in this study of soil treatments to replace methyl bromide, because of its well-known environmental impacts, with ozone or ozone in combination with a biological product (Trichomic) based on Trichoderma spp. Ozone was applied by ozonation of water to the concentration of 4 mg/l before planting and, in some cases, after planting. The biological product was applied alone or in combination with ozone at the dose of 0.5 ml of Trichomic per m2 soil area. The experiment was done in an unheated plastic greenhouse with tomato cultivation. Estimation of treatment effectiveness was based on fruit production and daily growth of plants, as well as on the percentage of plants with corky root, Fusarium foot rot, and/or Fusarium wilt. Fruit production was increased by 39.7 and 40.4%, respectively, when ozone was used alone either before or before and after planting. Increases in fruit production where the biological product Trichomic was used alone or with ozone ranged from 39.2 to 40.5%. The highest plant growth rate was observed where Trichomic was applied after ozone. The lowest percentage of diseased plants was observed following double applications of ozone or ozone followed by Trichomic. | |
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