Soil and seed materialTwo different soils were tested. Soil 1, infested soil, was obtainedfrom a field with a high level of Verticillium wilt in 2008. Anuninfested control soil, soil 2, which contained 17.5% clay (<2mm),25.2% silt (2e63mm), 55% sand (>63mm) and 2.3% organic matter,was obtained from Research Centre Flakkebjerg and mixed withsand and sphagnum (Kekkil€ a Garden white 420 W). In earlier experiments, soil 2 did not show any sign of infestation by Verticilliumspp. or other soilborne pathogens.
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