Table 3.
The number of irradiated and mortal rhizomes of Curcuma alismatifolia varieties after acute irradiation with different doses of gamma rays.
| Dose (Gray) | Total number of irradiated rhizomes in each var. | Number of mortal rhizomes after 40 days | Mortality rate (%) in each dose |
|||
|---|---|---|---|---|---|---|
| Doi Tung 554 | Chiang Mai Red | Sweet Pink | Kimono Pink | |||
| 0 | 20 | 0 | 0 | 0 | 0 | 0 |
| 10 | 20 | 0 | 0 | 0 | 0 | 0 |
| 20 | 20 | 1 | 10 | 8 | 6 | 31.2 |
| 25 | 20 | 10 | 15 | 12 | 10 | 58.7 |
| 35 | 20 | 13 | 18 | 16 | 15 | 77.5 |
| 40 | 20 | 18 | 19 | 19 | 17 | 91.2 |
| 60 | 20 | 20 | 20 | 19 | 20 | 98.7 |
| 100 | 20 | 20 | 20 | 20 | 20 | 100 |
| Total | 160 | 81 | 102 | 94 | 88 | |
| Mortality rate (%) | 51 | 63 | 58 | 55 | ||
| LD50 (%) | 28 Gy | 21 Gy | 23 Gy | 25 Gy | ||
| Confidence limits (95%) | 25–31 Gy | 17–23 Gy | 19–26 Gy | 22–28 Gy | ||