FIGURE 2.

Percentage of straw residues of oats or wheat from the previous years’ crop from which Fusarium was isolated. The residues were collected on the soil surface at sowing at Solør and Østfold in the years 2010, 2011, and 2012. The previous crop is indicated in brackets. Hatched bars represent data from plots where most of the straw was removed in autumn (I). Filled bars indicate that the straw was chopped and retained in the field in autumn (II). The gray tones of the bars relates to the different Fusarium species.