Table 2. Larvicidal activity of Indian and Thai ylang-ylang essential oils against Ae. aegypti.
| Essential oils | Time after exposure | LC25 (UCL-LCL)(ppm) | LC50 (UCL-LCL)(ppm) | LC90 (UCL-LCL) (ppm) | Slope ± SE | χ2 |
|---|---|---|---|---|---|---|
| Indian ylang-ylang | 24 h | 0.046 (0.028-0.052) |
0.064 (0.046-0.080) |
0.120 (0.107-0.198) |
4.748 ± 0.376 | 23.392 |
| 48 h | 0.047 (0.028-0.052) |
0.064 (0.047-0.080) |
0.120 (0.107-0.198) |
4.748 ± 0.377 | 23.392 | |
| Thai ylang-ylang | 24 h | 0.028 (0.017-0.033) |
0.042 (0.030-0.051) |
0.093 (0.078-0.139) |
3.691 ± 0.300 | 13.667 |
| 48 h | 0.028 (0.025-0.031) |
0.041 (0.036-0.044) |
0.078 (0.072-0.087) |
4.469 ± 0.324 | 8.642 |
LC = lethal concentration, UCL = upper confidence limit, LCL = lower confidence limit, SE = standard error, χ2 = Chi-square.