Table 2.
Fumigant toxicity of essential oils and their combination against Callosobruchus maculatus.
| Time | LC50 (µL/mL) |
CL (µL/mL) |
Slope ± SE | Chi- Square | p-Value | Co-Toxicity Coefficient | Interaction Type |
|---|---|---|---|---|---|---|---|
| Tagetes minuta | |||||||
| 24 h | 3.42 | 2.85–4.06 | 3.25 ± 0.44 | 5.1 | 0.16 | - | - |
| 48 h | 2.02 | 1.63–2.43 | 3.20 ± 0.44 | 4.3 | 0.23 | - | - |
| Mentha piperita | |||||||
| 24 h | 1.76 | 1.50–2.02 | 4.03 ± 0.57 | 4.80 | 0.19 | - | - |
| 48 h | 1.12 | 0.86–1.35 | 3.36 ± 0.55 | 2.78 | 0.43 | - | - |
| Mentha spicata | |||||||
| 24 h | 2.74 | 1.69–3.97 | 1.33 ± 0.33 | 1.35 | 0.72 | - | - |
| 48 h | 0.92 | 0.47–1.30 | 2.22 ± 0.46 | 1.17 | 0.76 | - | - |
| Tagetes minuta + Mentha piperita | |||||||
| 24 h | 4.93 | 4.11–6.06 | 3.04 ± 0.49 | 2.59 | 0.46 | 69.37 | Independent |
| 48 h | 2.40 | 2.03–2.80 | 4.30 ± 0.55 | 3.20 | 0.36 | 84.17 | Independent |
| Tagetes minuta + Mentha spicata | |||||||
| 24 h | 2.42 | 1.91–2.94 | 2.77 ± 0.40 | 5.31 | 0.15 | 141.32 | Synergistic |
| 48 h | 1.42 | 1.05–1.77 | 3.01 ± 0.48 | 1.71 | 0.64 | 142.25 | Synergistic |
CL: Confidence limits.