Table 2.

Log-dose probit estimated data of imidacloprid, profenofos and thiodicarb against field populations of Phenacoccus solenopsis.

Insecticide	Population	n	Slope ± SE	χ2 (df)	P	LC50 (mg L−1)	FL 95%	RR	LC99 (mg L−1)	FL 95%
Imidacloprid	Junagadh	210	0.804 ± 0.125	3.284 (5)	0.511	16.89	8.996–30.269	5.78	224.42	126.95–596.10
	Ludhiana	210	0.462 ± 0.114	0.553 (5)	0.968	4.87	0.816–12.855	1.67	127.61	63.01–416.26
	Saoner	203	0.798 ± 0.126	6.445 (5)	0.168	25.68	7.475–90.063	8.79	348.76	157.65–868.36
	Chhindwara	210	0.811 ± 0.126	4.468 (5)	0.346	23.34	4.289–117.15	7.99	408.35	207.42–946.48
	Lab population	232	0.792 ± 0.194	0.922 (5)	0.038	2.92	2.333–3.672	1.00	56.132	31.24–139.05
Profenofos	Junagadh	220	0.747 ± 0.129	5.009 (5)	0.287	82.23	33.057–65.14	55.94	506.10	278.51–974.16
	Ludhiana	232	0.785 ± 0.124	0.782 (5)	0.941	27.74	5.519–55.21	18.87	405.22	221.43–737.91
	Saoner	210	0.769 ± 0.128	0.429 (5)	0.980	88.00	24.730–20.57	59.86	525.60	267.76–805.05
	Chhindwara	240	0.693 ± 0.122	1.978 (5)	0.740	54.76	22.842–12.61	37.25	694.79	219.78–869. 26
	Lab population	240	1.294 ± 0.275	0.392 (5)	0.096	1.47	1.011–2.091	1.00	24.92	10.55–51.65
Thiodicarb	Junagadh	210	1.304 ± 0.163	2.131 (5)	0.712	16.75	11.041–5.116	6.36	616.25	242.12–1155.30
	Ludhiana	222	0.785 ± 0.124	0.280 (5)	0.991	52.88	39.92–110.46	20.07	421.79	205.22–817.72
	Saoner	242	0.619 ± 0.119	2.861 (5)	0.582	5.643	1.832–11.926	2.14	89.57	49.35–241.59
	Chhindwara	210	0.699 ± 0.121	2.946 (5)	0.567	35.38	18.341–53.874	13.43	558.85	259.91–802.63
	Lab population	232	0.676 ± 0.221	1.467 (5)	0.367	2.635	2.038–3.371	1.00	44.412	35.56–158.46

n, number of insects tested; SE, Standard Error; χ², chi-square testing goodness of fit of concentration-mortality response; df, Degrees of freedom; LC in mg L⁻¹, Lethal Concentration; FL, Fiducial Limits; Relative Resistance (RR) = LC₅₀ of field collected test population/LC₅₀ of Laboratory Susceptible check.