Figure 2.

(A) Abundance of inoculum of the plant pathogen R. solani AG8 (pg DNA/g soil) as determined by quantitative PCR on soil samples collected prior to sowing and at different stages of the cropping season, and (B) root disease index (%) as assessed on plant roots sampled at 8 weeks post-sowing. Bars represent average values ± standard error. Values for suppressive and non-suppressive samples from the same sampling time that differed significantly (by paired t-test P < 0.01) are denoted with different letters.