Table 4.

Toxicity of temephos, deltamethrin, and permethrin with or without synergist in Aedes albopictus strains.

Strain	Treatment	LC50 (95% CI) (µg/ml)	Fit of probit line				SR£(95% CI)
			Slope (S.E)	χ2	df	p£
Ref-S	Temephos	0.05 (0.04–0.07)	2.88 (0.24)	4.79	4	0.31
Ref-S	Temephos + DEF	0.05 (0.03–0.06)ns	2.42 (0.18)	4.24	4	0.37	1.00 (0.89–1.32)
Ref-S	Temephos + PBO	0.06 (0.04–0.07) ns	2.69 (0.20)	6.94	4	0.14	0.84 (0.76–1.11)
Ref-S	Deltamethrin	1.48 (1.13–1.92)	2.88 (0.22)	7.89	4	0.10	–
Ref-S	Deltamethrin + DEF	1.25 (0.92–1.70) ns	2.51 (0.19)	9.05	4	0.06	1.18 (0.97–1.43)
Ref-S	Deltamethrin + PBO	1.31 (0.98–1.73) ns	2.13 (0.17)	6.43	4	0.17	1.13 (0.92–1.38)
Ref-S	Permethrin	0.54 (0.43–0.68)	2.31 (0.18)	4.80	4	0.31	–
Ref-S	Permethrin + DEF	0.56 (0.42–0.76) ns	2.27 (0.17)	7.65	4	0.11	0.96 (0.77–1.18)
Ref-S	Permethrin + PBO	0.49 (0.36–0.67) ns	2.49 (0.19)	8.85	4	0.06	1.10 (0.89–1.34)
Rawalpindi	Temephos	0.64 (0.51–0.85)	1.48 (0.15)	2.85	4	0.58
Rawalpindi	Temephos + DEF	0.29 (0.23–0.38)*	1.35 (0.14)	2.60	4	0.63	2.25 (1.56–3.25)**
Rawalpindi	Temephos + PBO	0.24 (0.19–0.32)*	1.38 (0.14)	2.31	4	0.68	2.66 (1.87–3.78)**
Faisalabad	Deltamethrin	28.84 (21.52–43.54)	1.44 (0.17)	0.52	4	0.97	–
Faisalabad	Deltamethrin + DEF	10.94 (8.26–15.98)*	1.31 (0.14)	0.92	4	0.92	2.64 (1.64–4.24)**
Faisalabad	Deltamethrin + PBO	13.92 (10.46–19.22)*	1.45 (0.17)	2.08	4	0.72	2.07 (1.28–3.35)**
Sialkot	Permethrin	37.14 (25.74–64.56)	1.25 (0.16)	2.57	4	0.63
Sialkot	Permethrin + DEF	19.17 (14.65–24.35)*	1.30 (0.15)	1.12	4	0.89	1.94 (1.13–3.33)**
Sialkot	Permethrin + PBO	14.18 (10.53–20.87)*	1.60 (0.15)	4.39	4	0.36	2.62 (1.59–4.31)**

£SR, synergism ratio = (LC₅₀ of temephos, deltamethrin or permethrin alone) ÷ (LC₅₀ of temephos, deltamethrin or permethrin plus PBO or DEF).

ns, non-significant (p > 0.05) based on overlapping 95% CI of LC₅₀ values of insecticides plus PBO or DEF when compared with that of the LC₅₀ of insecticide alone.

**Significant SR, 95% CIs of SR did not include 1³⁹.