The percent occurrence of trunk canker in treated red and Norway maples for different size classes of trees. Degree of severity is based on ratings defined in Methods and Materials.
| Severity | ||||
|---|---|---|---|---|
| DBH1(inches) | 1 | 2 | ►2 | total |
| Red maple | ||||
| 9-13 | 44 | 22 | 22 | 88 |
| 13-16 | 22 | 11 | 33 | 66 |
| 16-19 | 22 | 22 | 11 | 55 |
| 19-23 | 3 | 1 | 4 | 8 |
| Norway maple | ||||
| 3-3.5 | 26 | 20 | 20 | 66 |
| 3.5-5 | 31 | 19 | 18 | 68 |
| 5-6 | 40 | 40 | 13 | 93 |
| 6-16 | 40 | 13 | 6 | 53 |
↵1 each size range represents a quartile grouping for each species.