Table 3 Performance of the different tannin-based preservatives against termites
From: Tannin-caprolactam and Tannin-PEG formulations as outdoor wood preservatives: biological properties
Formulation | Leaching | Mean worker survival rate (%) (SD) | Mean weight loss (%) (SD) | Repartition of the sample in each visual rating class (%) | ||||
|---|---|---|---|---|---|---|---|---|
0 | 1 | 2 | 3 | 4 | ||||
Control | – | 71.82 (9.18) | 10.22 (1.05) | 0 | 0 | 0 | 0 | 100 |
Pure boric acid | Unleached | 0 | 1.54 (2.16) | 16.7 | 83.3 | 0 | 0 | 0 |
NF X 41-569 | 0 | 2.31 (1.72) | 0 | 0 | 0 | 50.0 | 50.0 | |
EN 84 | 55.47 (7.95) | 11.33 (3.45) | 0 | 0 | 0 | 0 | 100 | |
Tannin-boron | Unleached | 0 | 2.4 (0.4) | 0 | 100 | 0 | 0 | 0 |
NF X 41-569 | 0 | 1.5 (0.1) | 0 | 0 | 100 | 0 | 0 | |
Tannin-boron-caprolactam | Unleached | 0 | 1.45 (0.16) | 50.0 | 50.0 | 0 | 0 | 0 |
NF X 41-569 | 0 | 0.65 (0.31) | 0 | 50.0 | 50.0 | 0 | 0 | |
EN 84 | 0 | 1.92 (0.23) | 0 | 0 | 0 | 83.3 | 16.7 | |