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Table 2 Chemical ingredients of new and 5 years of field used net detected by HPLC technique

From: Durability associated efficacy of long-lasting insecticidal nets after five years of household use

Net Condition

Number of washing

Deltermethrin content (mg/m2)

R-isomer

Bioefficacy Tests

    

KD 60

FM 24 Hrs

New Net

0

66.5

3.6

84

100

Old net A/01/F0

130

n.d

< 0.5

14

20

Old net A/02/F0

130

n.d

< 0.5

10

8

Old net A/04/F0

130

n.d

< 0.5

0

10

Old net A/05/F0

128

n.d

< 0.5

0

10

Old net A/07/F0

130

n.d

< 0.5

0

10

Old net A/09/F0

126

n.d

< 0.5

0

10

Old net A/10/F0

130

n.d

< 0.5

0

10

  1. n.d = No Deltermethrin detected, FM = mortality in 24 hours after contact bioassay.