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Table 3 Diagnostic doses for temephos and permethrin determined using the New Orleans strain

From: Resistance to commonly used insecticides and underlying mechanisms of resistance in Aedes aegypti (L.) from Sri Lanka

Population LC50 (95% CI) Resistance ratio (RR50) LC90 (95% CI) Resistance ratio (RR90)
Temephos
 Colombo 0.0167 (0.0145–0.0192) 3.88 0.0414 (0.0318–0.0538) 6.47
 Galle 0.0169 (0.0155–0.0184) 3.93 0.036 (0.031–0.042) 5.63
 Puttalum 0.0030 (0.0026–0.0033) 0.69 0.0071 (0.006–0.008) 1.11
 Trincomalee 0.0169 (0.0143–0.0199) 3.93 0.0434 (0.029–0.063) 6.78
 Hambanthota 0.0112 (0.0103–0.0121) 2.60 0.0210 (0.0179–0.0245) 3.28
 New Orleans 0.0043 (0.0040–0.0045) 1.0 0.0064 (0.0059–0.0070) 1.00
Permethrin
 Colombo 8.75 (7.84–9.98) 12.9 15.88 (12.52–17.98) 9.62
 Galle 5.04 (4.23–5.99) 7.4 17.30 (13.10–22.86) 10.48
 Puttalum 1.80 (1.57–2.05) 2.6 5.13 (3.92–6.72) 3.11
 Trincomalee 4.42 (3.87–5.05) 6.5 11.42 (8.88–14.69) 6.92
 Hambanthota 5.84 (5.24–6.52) 8.6 10.52 (8.75–13.49) 6.38
 New Orleans 0.6783 (0.6078–0.7569) 1.0 1.65 (1.26–2.16) 1.00
  1. Abbreviations: LC, lethal concentration; CI, confidence interval