Facts:
In organic tomato production, soil-borne plant diseases are one of the main yield reducing factors. Two of the most problematic diseases are the corky root disease, caused by Pyrenochaeta lycopersici, and fusarium crown and root rot, caused by Fusarium oxysporum f.sp. radicis-lycopersici. These pathogens are producing resting structures in the soil, and their control is difficult since the soil cannot be sanitized between crop cultures - existing methods such as changing the soil, soil fumigation or heating are problematic and also restricted due to rules for organic production, costs, energy consumption and working safety requirements.