Table 2.
Estimates of the LC50 and LC90 values (mg L−1) and confidence interval calculated 120 h after bioassays of the topical application of essential oils and the spinetoram-based synthetic insecticide (Delegate 250 WG™) on Drosophila suzukii adults.
| Treatments | Slope ± SE | LC50 (95% CI) a | LC90 (95% CI) b | χ2 c | df d |
|---|---|---|---|---|---|
| Cinnamomum verum, | 2.74 ± 0.21 | 11.02 (10.12–13.45) | 17.12 (16.10–18.11) | 5.44 | 6 |
| Cupressus sempervirens | 2.78 ± 0.17 | 14.45 (13.76–15.44) | 24.21 (22.13–25.11) | 7.11 | 6 |
| Cymbopogon citratus QT citratus | 3.11 ± 0.11 | 10.12 (8.11–12.78) | 16.18 (15.11–17.98) | 8.12 | 6 |
| Cymbopogon martinii | 2.98 ± 0.21 | 11.73 (10.44–13.79) | 17.10 (16.13–18.11) | 5.10 | 6 |
| Cymbopogon flexuosus | 3.07 ± 0.16 | 6.11 (5.75–7.43) | 17.68 (16.13–19.17) | 6.03 | 6 |
| Cymbopognon citratus QT myrcene | 2.75 ± 0.11 | 12.67 (11.74–14.90) | 26.12 (25.01–28.17) | 5.44 | 6 |
| Cymbopognon winterianus | 2.74 ± 0.22 | 11.54 (10.23–14.98) | 18.17 (16.08–19.10) | 9.78 | 6 |
| Eucalyptus globulus | 2.95 ± 0.11 | 14.10 (12.76–16.89) | 24.56 (22.13–27.89) | 8.12 | 6 |
| Eucalyptus radiata | 2.87 ± 0.14 | 10.43 (9.72–11.13) | 18.15 (16.19–20.11) | 6.13 | 6 |
| Eucalyptus staigeriana | 3.08 ± 0.12 | 11.23 (9.55–13.75) | 16.12 (15.97–17.01) | 7.11 | 6 |
| Eucalyptus citriodora | 2.97 ± 0.22 | 12.12 (11.75–14.20) | 23.44 (21.76–25.16) | 8.19. | 6 |
| Mentha arvensis | 3.10 ± 0.14 | 5.07 (3.11–6.10) | 15.62 (14.45–17.12) | 9.90 | 6 |
| Mentha cardiaca | 2.98 ± 0.16 | 7.10 (5.95–9.24) | 16.23 (14.54–18.23) | 8.16 | 6 |
| Mentha spicata | 3.08 ± 0.18 | 8.14 (6.04–9.74) | 17.34 (15.23–18.12) | 7.35 | 6 |
| Mentha piperita | 2.95 ± 0.13 | 7.98 (5.24–9.11) | 16.78 (15.89–19.11) | 7.14 | 6 |
| Mentha citrata | 2.67 ± 0.15 | 8.97 (6.07–11.24) | 17.89 (16.78–19.34) | 8.45 | 6 |
| Melaleuca alternifolia | 2.87 ± 0.10 | 17.13 (15-60–19.20) | 22.78 (21.15–24.97) | 8.07 | 6 |
| Ocimum basilicum | 3.07 ± 0.14 | 18.10 (17.74–20.05) | 23.44 (22.14–25.17) | 6.40 | 6 |
| Pogostemon cablin | 2.76 ± 0.16 | 19.28 (17.18–22.40) | 20.79 (19.11–23.44) | 5.53 | 6 |
| Delegate 250 WG™ | 2.78 ± 0.09 | 30.12 (28.75–32.44) | 26.23 (24.24–28.79 | 6.12 | 6 |
a LC50 and b LC90: Insecticide concentrations (mg L−1) required to kill 50 or 90% of the adults of D. suzukii, respectively (CI: confidence interval at 95% error probability); c χ2: Pearson’s chi-square value; d df: degrees of freedom.