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Table 1 Cumulative BG-Sentinel™ trap catches for immediate release (IR) 1 and delayed release (DR) 2 trials with Ae. aegypti 3 exposed to DDT-treated fabrics

From: Effect of Aedes aegypti exposure to spatial repellent chemicals on BG-Sentinel™ trap catches

 

Cumulative mean percentage (±SD) of released Ae. aegypti recaptured by time point4

 

Surface area coverage

Release 5 / Treatments

←‒‒‒Day 1‒‒‒‒‒→

←‒‒‒‒‒‒‒‒‒‒‒‒‒‒‒Day 2‒‒‒‒‒‒‒‒‒‒‒‒‒‒‒‒→

←‒‒‒‒‒‒‒‒‒‒‒‒‒‒‒‒‒Day 3‒‒‒‒‒‒‒‒‒‒‒‒‒‒‒‒‒‒‒→

 

Mean day-time (12 hr) conditions

  

13:30 h

17:30 h

05:30 h

09:30 h

13:30 h

17:30 h

05:30 h

09:30 h

13:30 h

17:30 h

N6

Temp (°C)

RH (%)

Light intensity (lx/ft2)

75%

IRa

              

Control

91.9a (±4.5)

92.9a (±3.5)

92.9a (±3.5)

93.4a (±3.5)

93.4a (±3.5)

93.4a (±3.5)

-

-

-

-

185/198

33.4

25.9

382.1

DDT (2 g ai/m2)

89.2a (±5.3)

89.2a (±5.3)

90.7a (±4.1)

90.7a (±4.1)

91.8a (±3.8)

91.8a (±3.8)

-

-

-

-

178/194

31.9

28.6

331.6

DRa

              

Control

-

-

-

89.3a (±4.8)

90.3a (±3.7)

90.3a (±3.7)

90.3a (±3.7)

90.3a (±3.7)

90.3a (±3.7)

90.3a (±3.7)

177/196

33.5

25.9

371.7

DDT (2 g ai/m2)

-

-

-

90.7a (±5.2)

91.8a (±3.8)

91.8a (±3.8)

91.8a (±3.8)

91.8a (±3.8)

91.8a (±3.8)

91.8a (±3.8)

178/194

31.9

28.4

318.8

50%

IRa

              

Control

79.9a (±10.6)

83.9a (±4.9)

84.4a (±5.9)

85.4a (±5.5)

85.4a (±5.5)

85.4a (±5.5)

    

170/199

28.7

31.9

479.0

DDT (2 g ai/m2)

87.4a (±9.6)

89.9a (±7.7)

90.4a (±7.7)

90.4a (±7.7)

90.4a (±7.7)

90.4a (±7.7)

-

-

-

-

178/198

29.7

69.1

454.5

DRa

              

Control

   

79.2a (±10.8)

85.3a (±5.9)

85.3a (±5.9)

85.3a (±5.9)

85.3a (±5.9)

85.8a (±6.3)

85.8a (±6.3)

169/197

30.8

66.7

494.2

DDT (2 g ai/m2)

   

76.5a (±11.1)

84.5a (±3.4)

84.5a (±3.4)

85.0a (±3.5)

85.0a (±3.5)

85.5a (±3.5)

85.5a (±3.5)

171/200

29.2

71.8

501.2

25%

IRa

              

Control

94.4a (±4.7)

95.9a (±4.5)

96.4a (±4.6)

96.4a (±4.6)

96.4a (±4.6)

96.4a (±4.6)

-

-

-

-

189/196

28.1

24.4

192.16

DDT (2 g ai/m2)

93.9a (±3.0)

93.9a (±3.0)

93.9a (±3.0)

93.91a (±2.95)

93.9a (±3.0)

93.9a (±3.0)

-

-

-

-

185/197

27.4

26.0

126.2

DDT (1 g ai/m2)

87.2a (±14.6)

93.3a (±3.9)

93.9a (±3.6)

93.9a (±3.6)

93.9a (±3.6)

93.9a (±3.6)

    

183/195

27.1

31.7

76.4

DRa

              

Control

-

-

-

77.2a (±8.9)

91.2a (±3.7)

91.2a (±3.7)

91.2a (±3.7)

91.2a (±3.7)

91.2a (±3.7)

91.2a (±3.7)

176/193

28.4

25.3

205.5

DDT (2 g ai/m2)

-

-

-

90.0a (±5.4)

95.5a (±2.6)

95.5a (±2.6)

95.5a (±2.6)

95.5a (±2.6)

95.5a (±2.6)

95.5a (±2.6)

190/199

27.8

26.6

135.2

 

DDT (1 g ai/m2)

-

-

-

89.6a (±4.7)

92.8a (±4.11)

92.8a (±4.1)

92.8a (±4.1)

92.8a (±4.1)

92.8a (±4.1)

92.8a (±4.1)

181/195

27.5

32.8

85.6

  1. 1 Cohort exposed from 0600–1200 hours and released immediately afterwards.
  2. 2 Cohort exposed from 1200–1800 hours but released only after a holding period of 12 h.
  3. 3 3–5 day old starved females.
  4. 4 Different lowercase letters in the same column indicate significant differences between mean recapture percentages for released females within release trial types (IR or DR; Kruskal-Wallis 95% confidence limit ) or between IR and DR trials (Mann-U Whitney Test, 95% confidence limit).
  5. 5 Different lowercase letters in the same column indicate significant differences between mean recapture percentages for released females between IR and DR trials (Mann-U Whitney Test, 95% confidence limit).
  6. 6Total recaptured /total released minus total knock down.