Table 3.

Mean percent decay in American elms by injection history, diameter class at sample height (DSH), and breast height (dbh).

Decaying elmsnMean % decay2
Injection history
    Injected2843 (27)
    Non-injected3535 (24)
    P-value10.205
DSH class (cm)
    II (100–125)  823 (11)a
    III (125–150)1427 (19)ab
    IV (≥ 150)3748 (27)b
    P-value0.004
Dbh class (cm)
    II (75–100)  919 (10)a
    III (100–125)2735 (26)ab
    IV (≥ 125)2550 (25)b
    P-value0.005
  • 1Significant differences determined at P = 0.05.

  • 2Standard deviations in parenthesis and letters denote significant differences based on Tukey’s HSD.