Comparison of Biological Attributes of Culex quinquefasciatus (Diptera: Culicidae) Populations from India
Table 4
Comparative toxicity of DDT, deltamethrin, and malathion against populations of Cx. quinquefasciatus tested at the larval stage (larval bioassays).
Insecticide
Cx. quinquefasciatus Strain
Model parametersa
Lethal concentrationsb (mg/L)
Model fit
Intercept ± SE
Slope ± SE
LC50 (95% CI)
LC95 (95% CI)
DDT
Gorakhpur
300
1.04 (0.17)
2.54 (0.336)
0.51 (0.40–0.63)
3.40 (2.26–6.37)
35.25
<0.0001
Pune
300
0.58 (0.14)
1.99 (0.28)
0.39 (0.32–0.49)
1.72 (1.27–2.67)
17.49
<0.0001
Deltamethrin
Gorakhpur
300
10.06 (1.23)
2.77 (0.39)
0.0002 (0.00019–0.00027)
0.00092 (0.0007–0.0013)
66.85
<0.0001
Pune
300
10.07 (1.18)
2.9 (0.34)
0.00023 (0.00019–0.00028)
0.00092 (0.0007–0.001)
72.48
<0.0001
Malathion
Gorakhpur
300
3.28 (0.39)
2.42 (0.277)
0.10 (0.080–0.12)
0.67 (0.44–1.23)
69.52
<0.0001
Pune
300
1.99 (0.29)
1.98 (0.24)
0.044 (0.037–0.053)
0.21 (0.16–0.32)
45.03
<0.0001
The intercept and slope parameters are for logistic models in which the independent variable is natural logarithm of dose. Standard errors (SEs) for these values are shown in parentheses. LC50 and LC95 value; confidence intervals (CIs) for these values are shown in parentheses.
