Interactions between hosts (monocot or dicot) and substrates. Fitted values from mixed-effect model on activity standardized within substrates. Host preference of pathogenic fungi [dicot (D) or monocot (M)], substrate (FP, XG, XY, AXW, AL, SS, CS, SG) and the host*substrate interaction were treated as fixed effects; genus/species/isolate were nested random effects. Data used for this analysis included 17 species of dicot pathogens and 28 species of monocot pathogens. Dicot pathogens had significantly higher activity on the substrates FP, XG, AL and SS as determined by pairwise t-tests on fitted values from the model (P < 0.0005). Monocot pathogens had significantly higher activity on the substrates XY, AXW, CS and SG (P < 0.001). The middle black bar at the center of the notch indicates the median value, edges of boxes indicate the interquartile range and whiskers indicate minimum and maximum values.