Table 2.
LC50 values (µg/mL) for the tested four plant essential oils against imago of Aphis punicae and 3rd instar of Coccinella undecimpunctata larvae.
| Tested Insect | Essential Oil | LC50
(Confidence Interval Limits) |
S.R. * | Intercept ± SE | Slope ± SE | ꭓ2 | P |
|---|---|---|---|---|---|---|---|
| Aphis punicae | Mentha piperita | 2.971 (2.376–3.504) | −0.782 ± 0.126 | 0.263 ± 0.029 | 0.675 | 0.879 | |
| Mentha longifolia | 2.400 (1.750–2.945) | −0.642 ± 0.127 | 0.268 ± 0.030 | 4.443 | 0.217 | ||
| Salvia officinalis | 1.574 (0.940–2.043) | −0.563 ± 0.151 | 0.358 ± 0.047 | 1.001 | 0.801 | ||
| Salvia rosmarinus | 1.653 (0.945–2.190) | −0.497 ± 0.136 | 0.301 ± 0.037 | 6.046 | 0.109 | ||
| Coccinella undecimpunctata | Mentha piperita | 10.334 (6.513–16.716) | 3.478 | −0.970 ± 0.095 | 0.094 ± 0.009 | 9.898 | 0.019 |
| Mentha longifolia | 8.737 (3.862–15.949) | 3.640 | −0.840 ± 0.094 | 0.096 ± 0.010 | 13.583 | 0.004 | |
| Salvia officinalis | 6.237 (5.452–7.076) | 3.963 | −1.022 ± 0.106 | 0.164 ± 0.015 | 2.036 | 0.565 | |
| Salvia rosmarinus | 5.960 (1.764–14.809) | 3.606 | −0.877 ± 0.100 | 0.147 ± 0.013 | 26.640 | 0.001 |
* S.R. = selectivity ratio (LC50 for predator/LC50 for aphid).