Table 1. Larval periods of P. separata larvae fed with drug-coated maize leaves.
| Larval periods (day) | |||||
|---|---|---|---|---|---|
| Treatments | Concentration (mg L−1) | Third instar | t value | Fourth instar | t value |
| ODP | 20 | 4.99±0.48 | 7.371 | 4.41±0.53 | 4.568 |
| Toosendanin | 20 | 4.83±0.37 | 8.085 | 4.32±0.61 | 6.743 |
| Control | / | 3.08±0.64 | / | 2.93±0.24 | / |