Table 6. Relative toxicity of insecticides to the parental spinosad-resistant strain and its derived strain after 15-generations of selection for spinosad resistance.

Insecticides	No. insects	Slope ± SE	LC50 (95% CI) (µg a.i./mL)	RR50 (95% CI)	?2 (degrees of freedom)
Parental spinosad-resistant strain
Spinosad	264	1.85±0.23	0.410 (0.31–0.51)	-	1.51 (5)
Spinetoram	276	1.72±0.18	0.29 (0.23–0.38)	-	2.91 (5)
Abamectin	282	1.56±0.24	0.54 (0.31–0.78)	-	2.07 (5)
Chlorantraniliprole	243	2.84±0.38	12.18 (9.38–15.10)	-	2.40 (4)
Cartap	265	2.25±0.25	173.65 (137.26–214.16)	-	0.95 (5)
Chlorfenapyr	283	1.65±0.21	1.08 (0.74–1.44)	-	0.77 (5)
Indoxacarb	279	3.25±0.47	0.86 (0.69–1.04)	-	0.41 (5)
Thiamethoxam	300	1.65±0.17	1008.86 (717.56–1389.27)	-	5.49 (5)
Permethrin	281	1.87±0.21	269.15 (204.91–342.36)	-	5.49 (6)
Chlorpyrifos	273	2.30±0.23	509.16 (416.99–623.34)	-	2.30 (5)
Selected spinosad-resistant strain
Spinosad	238	1.47±0.19	1717.30 (998.16–2764.20)	4191.55 (4191.38–4191.72)	5.46 (4)
Spinetoram	211	1.62±0.23	195.94 (140.94–261.88)	656.99 (656.82–657.15)	2.32 (4)
Abamectin	282	1.66±0.18	2.85 (2.12–3.66)	5.25 (5.00–5.50)	2.15 (6)
Chlorantraniliprole	244	1.80±0.22	0.42 (0.30–0.55)	0.03 (0.01–0.20)	1.26 (5)
Cartap	243	1.21±0.20	105.34 (72.22–164.21)	0.61 (0.41–0.80)	0.32 (4)
Chlorfenapyr	432	1.19±0.12	3.80 (2.94–4.89)	3.53 (3.35–3.71)	3.86 (5)
Indoxacarb	313	1.68±0.19	1.19 (0.73–1.72)	1.38 (1.22–1.54)	6.64 (6)
Thiamethoxam	212	1.91±0.23	3573.35 (2414.90–5147.74)	3.54 (3.40–3.69)	4.40 (4)
Permethrin	238	1.62±0.19	662.07 (497.68–864.87)	2.46 (2.30–2.62)	2.12 (5)
Chlorpyrifos	299	1.82±0.19	951.97 (758.56–1221.65)	1.87 (1.73–2.00)	4.75 (5)

All of the concentration-mortality curves followed the probit model based on the χ² goodness-of-fit test (P>0.05).