Anaerobic soil disinfestation (ASD), through decomposition of organic matter in the soil is currently recommended for the control of soil borne pests including nematodes. A greenhouse trial was conducted aimed to assess the efficacy of different soil moisture regimes i.e. field capacity (FC), saturation (SA) and flooding (FL) with and without forage radish (Raphanus sativus) biomass addition on suppressing of root knot nematode (Meloidogyne incognita) in tomato plant growing soil. In addition

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... the six treatments of soil moisture regimes with and without fodder radish, Vydate, as synthetic chemical nematicide was used as positive control treatment. However, FC soil moisture regime without fodder radish served as negative control treatment. pH, redox potential (Eh) and oxygen diffusion rate (ODR) were measured at the soil in one-week intervals during 4 weeks of fodder radish decomposition period before tomato seedlings (cv. Elisa) transplanting. Numbers of (M. incognita), reproductive factor and galling index were determined 12weeks after transplanting. Tomato crop growth parameters including plant length, fresh and dry plant weights and fruit fresh weights were also recorded. Obtained data results that pH, Eh and ODR in the soil during 4 weeks of fodder radish decomposition dramatically declined under soil flooding with fodder radish green manure treatment. Flooding the soil with fodder radish significantly reduced nematode population density, reproductive factor and galling index values. The treatment was comparable to that obtained with Vydate treatment and was finally reflected on improvement of all studied tomato growth attributes.