Figure 7.

Summary of relative areas of lesions at different stand densities and inoculation positions. Notes: (A) Low intra- and inter-row spacing: inoculation in the poplar of Low intra- and inter-row spacing (n = 30 inoculation sites); High intra- and inter-row spacing: inoculation in the poplar of high intra- and inter-row spacing (n = 60 inoculation sites); (B) Top: inoculation in the top of the poplar (n = 45 inoculation sites); Bottom: inoculation in the bottom of the poplar (n = 45 biologically independent samples); bars indicate mean ± SEM, p values are shown, and p < 0.05 indicates significant differences between the treatments. The red transverse lines in bars represent the mean value and the red vertical lines represent the SEM value; The black lines below the p values represent the comparison of significance between the burning and toothpick inoculation groups.