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Table 2 Levels of deltamethrin and cyhalothrin resistance measured in Cx. p. quinquefasciatus

From: Sodium channel point mutations associated with pyrethroid resistance in Chinese strains of Culex pipiens quinquefasciatus (Diptera: Culicidae)

Population Insecticide LC50(ppm) (95% CL)1 Regression Equation χ2 P- value RR2
LA deltamethrin 0.001 (0.001, 0.001) Y = 7.412 + 2.371x 29.78 0.019 1
cyhalothrin 0.001 (0.001, 0.001) Y = 6.819 + 2.356x 16.76 0.606 1
CL deltamethrin 0.009 (0.006, 0.011) Y = 3.028 + 1.475x 13.34 0.648 9
cyhalothrin 0.014 (0.010, 0.017) Y = 2.898 + 1.551x 10.63 0.832 14
PX deltamethrin 0.428 (0.385, 0.476) Y = 0.842 + 2.284x 31.44 0.175 428
cyhalothrin 0.396 (0.332, 0.468) Y = 0.610 + 1.517x 24.84 0.305 396
BA deltamethrin 0.186 (0.151, 0.231) Y = 1.314 + 1.799x 23.34 0.105 186
cyhalothrin 0.215 (0.172, 0.264) Y = 0.761 + 1.139x 23.28 0.386 215
FH deltamethrin 1.019 (0.811, 1.268) Y = -0.012 + 1.439x 32.20 0.075 1019
cyhalothrin 1.291 (1.051, 1.560) Y = -0.165 + 1.484x 16.83 0.396 1291
ZJ deltamethrin 0.036 (0.031, 0.041) Y = 3.073 + 2.127x 18.05 0.703 36
cyhalothrin 0.042 (0.037, 0.048) Y = 3.048 + 2.215x 26.82 0.218 42
LS deltamethrin 0.312 (0.234, 0.413) Y = 0.630 + 0.541x 40.04 0.011 312
cyhalothrin 0.641 (0.520, 0.800) Y = 0.221 + 0.497x 25.05 0.295 641
  1. (LA = Lab strain; CL = Haikou Changliu; PX = Haikou Poxiang; BA = Qionghai Boao; FH = Sanya Fenghuang; ZJ = Guangdong Zhanjiang; LS = Hainan Lingshui.
  2. 1CL = confidence limits, 2RR = Resistance Ratio).