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Table 4 Frequencies of kdr genotypes in relation to mosquito phenotypical resistance/susceptibility as determined by resistibility bioassays of pyrethroid and organophosphate in F1 progeny of two Anopheles sinensis populations from Chongming District, Shanghai

From: Resistance to pyrethroid and organophosphate insecticides, and the geographical distribution and polymorphisms of target-site mutations in voltage-gated sodium channel and acetylcholinesterase 1 genes in Anopheles sinensis populations in Shanghai, China

Population

Insecticide

Status

n

Frequencies of kdr genotypes (%)

1014L/1014L

1014L/1014F

1014L/1014C

1014F/1014C

1014C/1014C

1014F/1014F

CM-Xinhe population

0.15% cyfluthrin

Alive

8

12.50

  

25.00

 

62.50*

Dead

15

13.33

13.33

26.67

33.33

 

13.33

0.05% α-cypermethrin

Alive

12

8.33

16.67

8.33

33.33

 

33.33

Dead

9

33.33

11.11

33.33

22.22

  

0.05% deltamethrin

Alive

9

11.11

11.11

 

33.33

11.11

33.33

Dead

11

27.27

27.27

9.09

18.18

9.09

9.09

1% fenitrothion

Alive

8

 

12.50

 

12.50

 

75.00

Dead

7

14.28

14.28

14.28

28.57

 

28.57

CM-Dongtan population

0.15% cyfluthrin

Alive

1

100

     

Dead

21

100

     

0.05% α-cypermethrin

Alive

4

100

     

Dead

17

100

     

0.05% deltamethrin

Alive

1

100

     

Dead

23

100

     

1% fenitrothion

Alive

–

      

Dead

22

100

     
  1. Abbreviations: kdr, knockdown resistance; CM, Chongming District; n, number; L, Leu; F, Phe; C, Cys
  2. *P < 0.05