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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.