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Areas of feeding scars by Hylobius abietis on seedlings treated with treatments.
| Treatment | 2018 | 2019 | 2020 | |||
|---|---|---|---|---|---|---|
| Mean | SD | Mean | SD | Mean | SD | |
| Control | 149.1 | 275.1 | 336.2 | 450.4 | 480.7 | 708.1 |
| Chemical | 21.3 | 38.3 | 13.8 | 30.0 | 5.1 | 20.0 |
| Collar | 27.2 | 89.2 | 211.8 | 409.1 | 134.8 | 296.8 |
| Glue | 21.4 | 63.1 | 81.6 | 164.2 | 63.9 | 124.6 |
| Wax C | 8.7 | 52.4 | 338.2 | 497.1 | 501.4 | 669.7 |
| Wax F | 1.1 | 6.9 | 232.7 | 359.8 | 260.9 | 473.2 |
