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Comparative efficacy of spatial repellents containing d-allethrin and d-trans allethrin against the major dengue vector Aedes aegypti (Linnaeus)


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Figure 1

Binary logistic regression analysis of the knockdown effect of spatial repellents on Aedes aegypti generated using IRMA-Qcal software. (A) 0.2% d-allethrin; (B) 0.3% d-allethrin; (C) 0.1% d-trans allethrin; (D) 0.15% d-trans allethrin. Details of the knockdown times and slopes are in Table 1.
Binary logistic regression analysis of the knockdown effect of spatial repellents on Aedes aegypti generated using IRMA-Qcal software. (A) 0.2% d-allethrin; (B) 0.3% d-allethrin; (C) 0.1% d-trans allethrin; (D) 0.15% d-trans allethrin. Details of the knockdown times and slopes are in Table 1.

Mean mortality (%) of Aedes aegypti exposed to smouldering d-allethrin and d-trans allethrin coils

Active ingredient (a.i)% w/w a.i.Mortality ± SE (%)95 % CI
d-allethrin0.396.00 ± 2.08a91.91-100.09
0.282.67 ± 3.76b75.30-90.04
d-trans allethrin0.1585.67 ± 4.18b, a77.49-93.85
0.157.00 ± 7.81c41.69-72.31
Control0.33 ± 0.33d–0.33-0.99

Knockdown duration for Aedes aegypti exposed to smouldering d-allethrin or d-trans allethrin-containing coils

Active ingredient (a.i.)% w/w a.i.KT50 (min) (95% CI)KT90 (min) (95% CI)Slope ± SE
d-allethrin0.35.45a (5.22–5.69)8.98a (8.44–9.55)4.40 ± 0.25
0.26.45b (6.17–6.74)11.67b (10.92–12.47)3.71 ± 0.19
d-trans allethrin0.155.84a (5.60–6.11)10.08ac (9.45–10.74)3.99 ± 0.22
0.16.59b (6.34–6.85)10.59bc (9.98–11.25)4.63 ± 0.25
Control
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Language:
English
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Medicine, Assistive Professions, Nursing, Basic Medical Science, other, Clinical Medicine