| Average Activation Energy (KJ・mol−1) | ||||
| Varieties | ||||
| Crop period | Galmi Violet | Safari | Gandiol F1 | Orient F1 |
| March | 66.71 ± 0.12 | 58.66 ± 0.15 | 58.15 ± 0.19 | 59.12 ± 0.13 |
| June | 58.74 ± 0.11 | 49.96 ± 0.77 | 47.63 ± 0.28 | 49.87 ± 0.41 |