Table 2.
LC50 values (μL/L) of Mentha spp. EOs and their major constituents against R. dabieshanensis.
| EOs | LC30 (95% CI) |
LC50 a (95% CI b) |
LC90 (95% CI) |
Slope ± SD | (χ2) c | p Value |
|---|---|---|---|---|---|---|
| M. citrata | 0.119 (0.088–0.149) |
0.176 (0.139–0.225) |
0.460 (0.336–0.770) |
0.25 ± 0.2867 | 29.156 | 0.006 |
| M. piperita | 0.272 (0.219–0.325) |
0.366 (0.306–0.449) |
0.756 (0.585–1.181) |
0.205 ± 0.3583 | 22.459 | 0.049 |
| M. spicata | 0.116 (0.089–0.139) |
0.146 (0.119–0.178) |
0.256 (0.205–0.385) |
0.2883 ± 0.3416 | 34.256 | 0.001 |
| Linalool | 0.176 (0.114–0.230) |
0.303 (0.233–0.362) |
1.130 (0.889–1.674) |
0.1317 ± 0.285 | 9.893 | 0.703 |
| Menthol | 0.164 (0.132–0.196) |
0.272 (0.230–0.320) |
0.936 (0.731–1.318) |
0.2183 ± 0.1183 | 10.952 | 0.615 |
| Carvone | 0.111 (0.083–0.133) |
0.147 (0.121–0.178) |
0.290 (0.226–0.483) |
0.2367 ± 0.2533 | 42.123 | 0.001 |
a LC50, or Median lethal concentration, is the concentration at which half of the insects died. b CI95, Confidence intervals the activity of two compounds was considered significantly different when the 95% CIs failed to overlap. c Pearson’s chi-square, suggesting the goodness of fit test, is not significant (ns) at p > 0.05.