Table 1.
Probit regression line parameters of lab strain of Culex pipiens exposed to different insecticides
| Insecticides | A | B ± SE | LT50, 95% C.I. (Second) | LT90, 95% C.I. (Second) | X2 (df) | P value |
|---|---|---|---|---|---|---|
| DDT 4% | −9.21 | 2.64± 0.31 | 2647 | 7061 | 3.56(3) | >0.05 |
| 3005 | 9156 | |||||
| 3455 | 13701 | |||||
| Lambdacyhalothrin 0.05% | −2.50 | 1.31±0.18 | 43 | 510 | 2.41(2) | >0.05 |
| 79 | 752 | |||||
| 120 | 1302 | |||||
| Deltamethrin 0.05% | −4.17 | 1.6± 0.16 | 255 | 1443 | 5.85 (4) | >0.05 |
| 326 | 1937 | |||||
| 406 | 2872 | |||||
| Cyfluthrin 0.15% | −1.84 | 1.17±0.18 | 14 | 308 | 3.60(4) | >0.05 |
| 36 | 448 | |||||
| 64 | 725 |
A= y-intercept, B= the slope of the line, SE= Standard error, CI= confidence interval, x2= heterogeneity about the regression line, df= degree of freedom, P> 0.05 = represent no heterogeneity in the population of tested mosquitos.