Table 2 Knockdown resistance ratio of mosquito populations (An. gambiae [s.l.]) to different insecticides

Deltamethrin

Jaribuni

18

40.9–55.2

1.1

Shibe

16

43.9–58.1

0.9

Kidutani

18

42.9–57.3

1.1

Ngombeni

23

41.9–56.2

1.4

Mapawa

32

40.8–61.1

1.9

Mbogolo

25

39.8–60.2

1.5

Burangi

–^a

–^a

–^a

Mangororo

30

39.8–60.2

1.8

Permethrin

Jaribuni

18

39.9–60.2

1.0

Shibe

21.5

37.9–58.2

1.2

Kidutani

35.5

38.9–59.2

2.0

Ngombeni

30

40.8–61.1

1.7

Mapawa

20

39.8–60.2

1.1

Mbogolo

27

38.9–59.2

1.5

Burangi

60

37.9–58.2

3.3

Mangororo

30

39.8–60.2

1.7

Dichlorodiphenyltrichloroethane (DDT)

Jaribuni

30.5

40.9–55.2

2.1

Shibe

15

37.9–58.2

1.0

Kidutani

18

39.8–60.2

1.2

Ngombeni

27.3

39.8–60.2

1.9

Mapawa

31.5

39.8–60.2

2.2

Mbogolo

25

39.8–60.2

1.7

Burangi

24.4

36.9–57.2

1.7

Bendiocarb

Jaribuni

19.2

43.9–58.1

1.0

Shibe

19.3

39.8–60.2

1.0

Kidutani

22

39.8–60.2

1.2

Ngombeni

26.9

39.8–60.2

1.4

Mapawa

30

39.8–60.2

1.6

Mbogolo

23

37.9–58.2

1.2

Burangi

24

37.9–58.2

1.3

Mangororo

30

40.8–61.1

1.6

Fenitrothion

Jaribuni

46

37.9–58.1

2.1

Shibe

23.5

39.8–609.2

1.1

Kidutani

40

42.8–63.1

1.9

Ngombeni

31

38.9–59.2

1.5

Mapawa

21.5

37.9–58.2

1.0

Mbogolo

46.3

37.9–58.2

2.2

Burangi

36

36.9–57.2

1.7