Table 6.
Tests of the AromaScan A32S for the identification of 11 wood decay types, associated with specific wood-rotting fungi, determined by conductive polymer analysis using recognition files constructed from decay and host-specific reference libraries. Nine different wood types (species) were tested for each decay type, defined by the fungus causing the decay, as follows: Fraxinus pennsylvanica; Liquidambar styraciflua; Populus deltoides; Plantanus occidentalis; Pinus taeda; Quercus nuttallii; Quercus lyrata; Taxodium distichum; and Thuja occidentalis.
| Decay type unknowns | n= | Correctly identified1 | Incorrectly identified | Indeterminate, not identified2 | Mean % aroma class match3 |
|---|---|---|---|---|---|
| Armillaria gallica | 27 | 26 | 1 | 0 | 88.4 |
| Armillaria mellea | 54 | 51 | 0 | 3 | 95.1 |
| Armillaria ostoyae | 27 | 26 | 0 | 1 | 89.1 |
| Armillaria tabescens | 27 | 26 | 0 | 1 | 89.3 |
| Daedalea quercina | 27 | 26 | 0 | 1 | 88.4 |
| Ganoderma lucidum | 54 | 47 | 1 | 6 | 86.4 |
| Heterobasion annosum | 27 | 27 | 0 | 0 | 88.0 |
| Inonotus dryadeus | 27 | 26 | 0 | 1 | 88.4 |
| Laetiporus sulphureus | 27 | 24 | 3 | 0 | 85.0 |
| Phellinus pini | 54 | 53 | 0 | 1 | 95.6 |
| Stereum hirsutum | 27 | 27 | 0 | 0 | 88.9 |
| Totals | 378 | 359 (95.0%) | 5 (1.3%) | 14 (3.7%) |
Number of unknown decay type samples correctly identified in pure 4.5% MA cultures.
Number of unknown decay type samples identified to an incorrect aroma class.
Number of unknown decay type samples not identified to an aroma class due to <70% ownership in any one aroma class.
Mean percentage match of unknown decay type samples to the correct aroma class identity.