Table 2.
LC50 and LC90 (µg/mL) of essential oils on Culex quinquefasciatus at III instar and pupal stages after 24 h of exposure.
| Essential Oils | III Instar | Pupae | ||||
|---|---|---|---|---|---|---|
| LC50 | LC90 | Chi ** | LC50 | LC90 | Chi ** | |
| Cinnamomum verum J. Presl | 24.5 (23.2–25.8) | 53.7 (52.2–55.1) | 1.198 | 216.7 (212.8–220.6) | 374.1 (359.8–388.3) | 0.055 |
| Citrus aurantifolia Swingle | 14.1 (13.9–14.3) | 30.9 (28.4–33.4) | 0.039 | 184.9 (180.0–189.7) | 381.0 (365.6–396.5) | 1.331 |
| Cuminum cyminum Linnaeus | 23.3 (21.8–24.9) | 56.3 (52.4–60.1) | 0.048 | 98.4 (95.9–101.3) | 212.6 (199.5–225.8) | 0.020 |
| Syzygium aromaticum (L.) Merr. & L.M. Perry | 22.5 (21.5–23.7) | 49.7 (47.0–52.4) | 1.326 | 236.5 (232.5–240.4) | 447.0 (433.7–460.3) | 1.202 |
| Laurus nobilis Linnaeus | 49.0 (48.5–50.5) | 111.0 (107.0–115.0) | 0.674 | 204.9 (201.8–208.1) | 460.1 (442.4–447.8) | 0.571 |
| Lippia berlandieri Shauer | 6.5 (5.9–6.9) | 18.8 (17.8–19.8) | 0.268 | 181.0 (178.4–183.6) | 356.1 (341.0–371.1) | 0.645 |
| Pimpinella anisum Linnaeus | 4.6 (3.5–5.8) | 9.0 (8.5–9.5) | 2.572 | 51.6 (49.2–54.0) | 102.0 (85.1–118.8) | 0.016 |
| Temephos H (control) | 2.1 (1.8–2.5) | 5.2 (4.1–6.4) | 0.039 | 34.0 (29.1–39.0) | 49.2 (43.4–54.9) | 0.048 |
In parenthesis, 95% confidence intervals, essential oils activity is considered significantly different when the 95% CI fail to overlap. ** Chi-square value, significant at p < 0.05 level.