Results for standing-tree treatments in 2001 tree-of-heaven trialz.
| Canopy | Percent reduction | Canopy vigory | ||||
|---|---|---|---|---|---|---|
| Treatment method | Herbicide | Tree size | 2002 | 2003 | 2002 | 2003 |
| Stem injection | Glyphosate | — | 82.3 ab | 91.7 a | 2.3 b | 1.5 b |
| Imazapyr | — | 99.9 ab | 100.0 a | 0.1 b | 0.0 b | |
| Triclopyr | — | 66.7 b | 31.4 b | 6.2 a | 6.7 a | |
| Basal bark | Imazapyr | <4 cm dia | 100.0 a | 100.0 a | 0.0 b | 0.0 b |
| >4 cm dia | 99.8 ab | 100.0 a | 0.1 b | 0.0 b | ||
| Triclopyr | <4 cm dia | 90.0 ab | 86.7 a | 1.3 b | 1.7 b | |
| >4 cm dia | 100.0 a | 100.0 a | 0.0 b | 0.0 b | ||
| Uncut control | — | 12.5 c | 27.1 b | 8.8 a | 7.6 a | |
↵zAll canopy percent reduction and vigor measurements made in August of 2002 and 2003. Within each treatment group, values followed by different letters are different at a = 5% (analysis of variance, Student-Newman-Keuls test).
↵yVigor determined by visual evaluation on scale of 0 = dead and 10 = healthy.