Skip to main content

Table 6 Knock-down time and mortality rates of Anopheles arabiensis exposed to Pirimiphos-methyl for a period of 60 min in dry and rainy seasons

From: The influence of age on insecticide susceptibility of Anopheles arabiensis during dry and rainy seasons in rice irrigation schemes of Northern Tanzania

Age (days)

Season

Number tested

24 h mortality

95% CI

KDT50

95% CI

KDT95

95% CI

KDT50 ratio (RR)

2

Dry

–

–

–

–

–

–

–

–

Rain

800

100

0

23.4

22.2–24.7

40.8

38.4–43.5

1.7

3

Dry

–

–

–

–

–

–

–

–

Rain

800

100

0

23.3

22.1–24.6

40.6

38.2–43.3

1.7

5

Dry

–

–

–

–

–

–

–

–

Rain

800

100

0

31.6

30.0–33.1

54.9

51.9-58.4

2.3

10

Dry

–

–

–

–

–

–

–

–

Rain

800

100

0

36.2

34.6–37.9

63.0

59.7–66.9

2.6

Controla

Dry

–

–

–

–

–

–

–

–

Rain

800

100

–

13.8

–

25.1

–

–

  1. aControl was Anopheles gambiae aged 2 days old