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Classes of pine weevil damage (PWD) used to record damage levels for all plants in trial A.
| PWD class | Damage level (%) | PWD mid-class |
|---|---|---|
| 0 | 0 | 0 |
| 1 | >0 to ≤1 | 0.5% |
| 2 | >1 to ≤5 | 3% |
| 3 | >5 to ≤30 | 17.5% |
| 4 | >30 to ≤50 | 40% |
| 5 | >50 | 60%∗ |
Extent of damage in each class is expressed as a range of minimum and maximum percentages of debarked stem area. Mid-class values (PWD mid-class) were used to express PWD as a continuous variable. ∗Maximum PWD was 70% which means a mid-class value of 60%.
