Table 3 Residual toxicity of imidacloprid, profenofos and thiodicarb against field populations Aenasius arizonensis.

From: Field evolved insecticide resistance in the cotton mealybug Phenacoccus solenopsis and its direct and indirect impacts on the endoparasitoid Aenasius arizonensis

Insecticides

Populations

Slope ± SEm

χa (df)

P

LC50 (mg L−1)

Fiducial limit 95% CI

RR

Lower

Upper

Imidacloprid

Junagadh

1.750 ± 0.270

4.830 (5)

0.437

0.0036

0.0030

0.0042

18.0

Ludhiana

2.450 ± 0.341

10.33 (5)

0.066

0.0045

0.0022

0.0083

22.50

Saoner

2.127 ± 0.314

4.957 (5)

0.421

0.0035

0.0220

0.0460

17.50

Chhindwara

1.136 ± 0.162

7.310 (5)

0.198

0.0010

0.0008

0.0014

5.00

Lab population

0.798 ± 0.197

0.906 (5)

0.038

0.0002

0.0001

0.0008

1.00

Profenofos

Junagadh

1.860 ± 0.314

10.32 (5)

0.066

0.0060

0.0046

0.0079

60.0

Ludhiana

1.595 ± 0.254

12.03 (5)

0.034

0.0036

0.0026

0.0046

36.0

Saoner

3.255 ± 0.468

4.652 (5)

0.460

0.0031

0.0024

0.0042

31.0

Chhindwara

1.300 ± 0.186

4.432 (5)

0.490

0.0009

0.00021

0.00072

9.00

Lab population

1.294 ± 0.275

0.392 (5)

0.075

0.0001

0.00008

0.00015

1.00

Thiodicarb

Junagadh

1.931 ± 0.289

5.166 (5)

0.396

0.0030

0.0020

0.0050

7.14

Ludhiana

1.660 ± 0.256

7.545 (5)

0.183

0.0030

0.0010

0.0080

7.14

Saoner

2.301 ± 0.326

6.909 (5)

0.227

0.0043

0.0024

0.0062

10.24

Chhindwara

1.106 ± 0.183

5.370 (5)

0.372

0.0018

0.0012

0.0032

4.28

Lab population

1.351 ± 0.222

1.065 (5)

0.056

0.00042

0.00024

0.00085

1.00

  1. SE, Standard Error; χ2,chi-square test of goodness of fit of concentration-mortality response; df, Degrees of freedom; LC, Lethal Concentration; FL, Fiducial Limits; Relative Resistance (RR) = LC50 of field population/LC50 of laboratory reared Susceptible check.
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