Disease index Disease incidence
    May June Aug. Sep. May June Aug. Sep.
Soluble sugar content r -0.773 -0.838 -0.810 -0.787 -0.744 -0.773 -0.810 -0.787
P 0.125 0.076 0.051 0.058 0.149 0.125 0.097 0.114
Total phenolic content r -0.262 0.005 -0.519 -0.606 -0.320 -0.163 -0.660 -0.710
P 0.670 0.994 0.370 0.279 0.599 0.793 0.225 0.179
Note: r values represent the correlation coefficients between the contents of soluble sugar or total phenols of the pear leaves and scab resistance in different interspecies, positive values represent positive correlations, whereas negative values represent negative correlations; Pīš¤0.05 indicates significant correlations between the contents of soluble sugar or total phenols in the pear leaves of different interspecies and scab resistance
Table 4: The correlation between the contents of soluble sugar and total phenols of pear leaves and pear scab resistance in four different interspecies.