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

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

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
LA	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
CL	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
PX	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
BA	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
FH	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
ZJ	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
LS	cyhalothrin	0.641 (0.520, 0.800)	Y = 0.221 + 0.497x	25.05	0.295	641

(LA = Lab strain; CL = Haikou Changliu; PX = Haikou Poxiang; BA = Qionghai Boao; FH = Sanya Fenghuang; ZJ = Guangdong Zhanjiang; LS = Hainan Lingshui.
¹CL = confidence limits, ²RR = Resistance Ratio).

ISSN: 1756-3305