TABLE 3.
LC50 values (with corresponding 95% confidence intervals) for C. sinensis eggs after exposure to insecticides.
| Insecticides | Days of eggs | Regression equations | X2(df) | LC50 (mg/L) | CI | No. treated |
| Chlorpyrifos | D1 | y = 4.21 + 2.31x | 1.17 (3) | 2.21 | 1.80-2.72 | 600a |
| D2 | y = 3.65 + 1.41x | 3.97 (3) | 9.07 | 5.97-13.76 | 600a | |
| D3 | y = 2.82 + 1.55x | 3.43 (3) | 25.35 | 15.70-40.92 | 600a | |
| Chlorbenzuron | D1 | y = 4.32 + 1.12x | 2.23 (3) | 4.01 | 2.63-6.10 | 600a |
| D2 | y = 3.84 + 0.98x | 4.96 (3) | 15.36 | 7.18-32.88 | 600a | |
| D3 | y = 3.58 + 0.96x | 4.81 (3) | 31.05 | 18.26-52.79 | 600a | |
| λ-cyhalothrin | D1 | y = 4.32 + 1.02x | 2.37 (3) | 4.66 | 2.85-7.62 | 600a |
| D2 | y = 3.81 + 1.04x | 3.58 (3) | 14.11 | 8.81-22.58 | 600a | |
| D3 | y = 3.56 + 1.01x | 4.11 (3) | 26.94 | 16.83-43.13 | 600a | |
| Tebufenozide | D1 | y = 3.28 + 1.13x | 5.24 (3) | 33.14 | 20.66-53.17 | 600a |
| D2 | y = 2.86 + 1.31x | 7.63 (3) | 42.90 | 26.33-69.91 | 600a | |
| D3 | y = 2.82 + 1.35x | 6.12 (3) | 40.54 | 25.62-64.15 | 600a |
The results are presented as regression equations, degree of freedom (df), LC50, corresponding 95% confidence intervals (CI), number of treated embryos. Low X2 value (<11.00) indicates the data adequacy to the probit model used to estimate the mortality curves. a40 eggs per replicate, 3 replicates per dose, 5 doses per assay.