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Table 1 The percentage residual insecticide per net brand, after repeated washing and drying using four different drying regiments

From: Wash durability and optimal drying regimen of four brands of long-lasting insecticide-treated nets after repeated washing under tropical conditions

Net type

Drying regimen

Number of washes

  

W = 0

W = 5

W = 10

W = 15

W = 20

Olyset

Sun/hang

100*

92

84

81.7

70.8

 

Sun/Ground

100*

91

83.3

79

73.3

 

Shade/Ground

100*

95.1

91

81

77.1

 

Shade/Hang

100*

96

94

86

80.7

PerManet

Sun/hang

100*

54.6

31.8

29.6

27.5

 

Sun/Ground

100*

51.1

29.5

25.5

23.6

 

Shade/Ground

100*

34.5

27.3

21.8

18.2

 

Shade/Hang

100*

43.8

41.5

30.2

27.5

BASF

Sun/hang

100*

60

47.9

43.5

42

 

Sun/Ground

100*

49.8

47.9

41.8

40.5

 

Shade/Ground

100*

57

50.5

44

41.2

 

Shade/Hang

100*

80

60

56

54.5

TNT

Sun/hang

100*

69.3

53.9

52.9

46.5

 

Sun/Ground

100*

55.1

40

39.1

34.5

 

Shade/Ground

100*

56.6

50.8

46.2

40.3

 

Shade/Hang

100*

58.5

54

47.4

44.8

Conventional

Sun/hang

100*

43.6

32

16

7.2

 

Sun/Ground

100*

28

13.6

7,6

4

 

Shade/Ground

100*

34

24.4

11.6

5.2

 

Shade/Hang

100*

48

34

12.4

6

  1. Residual insecticide concentration per net brand after repeated washing * The initial insecticide concentrations were as follows: Olyset net, 1000 mg/m², Permanet 55 mg/m², BASF 200 mg/m², TNT 65 mg/m² and Conventional 25 mg/m.